Rigveda (ऋग्वेदः)

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The Rigveda is the oldest of the Vedas. All the other Vedas are based upon it and consist to a large degree of various mantras from it. It consists of about thousand richas of different seers, each sukta averaging around ten mantras. That the Rig Veda is the oldest book in Sanskrit or any language is widely accepted by the followers of Sanatana Dharma. Its date of composition is not definite and the Vedic period is a topic of debate among many scholars. As such it is not in the scope of this article.

Primarily the Rigveda is a treasure trove of stuti (a praise, a prayer, invocation) offered to different devatas by various rshis. It consists of respectful thoughts, praises of deeds of various deities in the form of mantras.

परिचयः ॥ Introduction

The Rig Veda is the book of Mantras called Rks or Richa-s. It contains the oldest form of all the Sanskrit mantras. It is built around a science of sound which comprehends the meaning and power of each letter. Most aspects of Vedic science like the practice of yoga, meditation, mantra and Ayurveda can be found in the Rig Veda and still use many terms that come from it.

While originally several different versions or recensions of the Rig Veda were said to exist, only one remains. Its form has been structured in several different ways to guarantee its authenticity and proper preservation through time.

व्युत्पत्तिः ॥ Etymology of Rk

Rigveda is made up of mantras called as Rk (ऋक् also called as ऋचः - Rchas) according to Shabdakalpadhruma.

ऋच्यन्ते स्तूयन्ते देवा अनया । (ऋच् + क्विप् ।) वेदविशेषः । ऋग्वेदः । इत्यमरः ॥

The (vaidik) devatas are offered worship and are prayed to using these Rk-s (ऋक्). Rcha means prarthana (to pray) or stuti (to praise), thus it is synonymous with praising and worshipping. Devatas are invoked using these mantras. Another name for Mantra is Rcha (ऋचः), but all mantras are not Rcha-s (ऋचः). The Purusha Sukta, in the famed Sahasra-sirsha (सहस्रशीर्षा) mantra, mentions that Rcha-s (ऋचः) were the first to arise from Parameshavara.

तस्माद्याज्ञात् सर्वहुतः ऋचः सामानि जज्ञिरे । छन्दांसि जज्ञिरे तस्माद्यजुस्तस्मादजायत । (Purusha Sukta)

A collection of Rchas is called the Rigveda Samhita. The term 'Samhita' implies a collection or group of. It was first studied by Shakala (mentioned also as Shakalya) and further by Baskala and four other (rshis).

ऋचां समूह ऋग्वेदस्तमभ्यस्य प्रयत्नतः। पठितः शाकलेनादौ चतुर्मिस्तदनन्तरम्।। (Rk. Pratisakhya)

All the aspects about rigveda vargeekarana, the shakas involved and extant texts, the arrangement of the mandalas and ashtakas are given in the article Veda Vargeekarana.

ऋचां क्रमविन्यासः ॥ Arrangement of Rks (Mantras)

There are many versions about the total number of richa-s and suktas in the Rgveda. Both ancient and modern scholars have put forth explanations about the differences in shakas of Rgveda. These differences are primarily due to the variations of the same richa-s during usage (प्रयोगकाल) and study times (अध्ययन-काल). Some richa-s have 4 padas during study but only two padas (द्विपदाः) during usage of the mantra.

In some texts, the valakhilya mantras, 80 of them at the end of the eighth mandala, are not taken into account along with the Rgveda mantras. Hence, after including the dvipada mantras and valakhilya mantras the total number of richa-s are given as 10552 in Katyayana's Rik-sarvanukramani text.

Each mantra of the Rgveda is associated with a Rshi, a Chandas, and a Devata.

अथ ऋषयः ॥१॥ यस्य वाक्यं स ऋषिः ॥४॥ या तेनोच्यते सा देवता ॥५॥ यदक्षरपरिमाणं तच्छंदः ॥६॥ तिस्त्र एव देवता: क्षित्यंतरिक्षद्युस्थाना, अग्निर्वायुः सूर्य इति ॥८॥ (Rig. Ved. Katy. Sarv. 2.3)

Mantras were revealed by mantra-drstha rshis. The subject matter of a mantra is the devata. The number of aksharas (syllables) in a mantra is given by the chandas. It has a definite number of syllables. There are three types of devatas belonging to kshiti (earth), antariksha, and dyu places of Agni, Vayu and Surya respectively. The list of rshis who revealed the mantras are given below in the Mandala krama table. Apart from them twenty-four mantra-drashta rshikas are also mentioned in the Rgveda.

गोधा धोषा विश्ववाराऽपालोपनिषन्निषत् ॥ ब्रह्मजाया जुहूर्नामागस्त्यस्य स्वसादितिः ॥ इद्राणी चंद्रमाता च सरमा रोमशोर्वशी ॥ लोपामुद्रा च नद्यश्च यमी नारी च शश्वती। श्रीर्लाक्षा सार्पराज्ञी वाक् श्रद्धा मेधा च दक्षिणा ॥ रात्री सूर्या च सावित्री ब्रह्मवादिभ्य ईरिताः॥ (Rig. Ved. Shau. Anuk)

Godha (गोधा), Ghosha (धोषा), Vishvavaara (विश्ववारा), Apaala (अपाला), Juhu (जुहू), Agastyasvasaa (अगस्त्यस्वसा), Aditi (अदिति), Indrani (इद्राणी), Sarama (सरमा), Romashaa (रोमशा), Urvashi (ऊर्वशी), Lopamudra (लोपामुद्रा), Nadi (नदी), Yami (यमी), Shashvati (शश्वती), Saarparaajni (सार्पराज्ञी), Vaak (वाक्), Shraddha (श्रद्धा), Dakshina (दक्षिणा), Savitri (सावित्री) are the brahmavadinis who contributed towards the mantras of the Rigveda.

Chandas

As mentioned in the previous sections, Rks are those mantras which are set in a shloka format (Padyatmaka) having a definite number of syllables in each pada of the mantra. Thus, they are said to be bound by the rules of Chandas. In the Rgveda although 20 different metres have been used, seven of them were used extensively. They are Gayatri (24 aksharas) Ushnik (28 aksharas) Anushtup (32 aksharas) Brhati (36 aksharas) Pankti (40 aksharas) Trishtup (44 aksharas) and Jagati (48 aksharas).

Of these kinds of chandas, four of them have been used in a large number of mantras. They are Gayatri, Anushtup, Trishtup and Jagati used in about 80% of the mantras. The other metres apart from these seven, include Atijagati (52 aksharas), Shakvari (56 aksharas) etc.

Deities

Yaska, the author of Nirukta has divided all devatas or deities based on three regions, namely

1. Prthvi-sthana devatas i.e. terrestrial deities
2. Antariksha-sthana-devatas i.e. atmospheric deities
3. Dyu-sthana-devatas i.e. celestial deities

Sthana	Prthvi	Antariksha	Dyu
Place	Terrestrial	Atmospheric	Celestial
Predominant Devata	Agni	Indra or Vayu	Surya
Devatas	Agni, Ap, Prithvi, and Soma	Indra, Vayu, Rudra, Marut, and Parjanya	Surya, Mitra, Varuna, Dyuh, Pusan, Savita, Aditya, Ashvins, Usas and Ratri

Only one devata is predominant among all devatas of each and every region while the rest are personifications of that devata. Each devata has a number of activities and each name has a reference to one such activity.

मण्डलक्रमः ॥ Mandala krama

The Rgveda samhita has 10552 mantras, grouped into 1017 suktas collected in ten mandalas of unequal length given by various rshis. In the Mandala krama it is arranged into 10 mandalas, 1017 suktas and 10552 or 10580 (as given in Shaunaka's Anuvakaanukramani) mantras, and 153826 words.

ऋचां दश सहस्राणि ऋचां पञ्च शतानि च । ऋचामशीतिः पादश्च पारणं संप्रकीर्तितम् ॥ (अनुवाकानुक्रमणी, 43)

Each sukta in a mandala is a collection of mantras. The number of mantras in a sukta are highly variable. Given below are the mandalas, suktas, the number of mantras and the mantra-drashta rshis therein.

Mandalas	Number of Suktas	Number of Mantras	Mantra Drashtas
Mandala 1	191	2006	शतर्चिनः (Shatarchina), Madhucchanda, Medhatithi, Deerghatama, Agastya, Gautama, Parashara etc
Mandala 2	43	429	गृत्समदः एवं उनके वंशज (Grtsamada and his lineage)
Mandala 3	62	627	विश्वामित्रः एवं उनके वंशज (Vishvamitra and his lineage)
Mandala 4	58	589	वामदेवः एवं उनके वंशज (Vamadeva and his lineage)
Mandala 5	87	727	अत्रिः एवं उनके वंशज (Atri and his lineage)
Mandala 6	75	765	भरद्वाजः एवं उनके वंशज (Bharadvaja and his lineage)
Mandala 7	108	841	वसिष्ठः एवं उनके वंशज (Vasishta and his lineage)
Mandala 8	92	1636	कण्व अङ्गिरसः एवं उनके वंशज (Kanva Angirasa and his lineage)
Mandala 9	114	1108	ऋषिगण, विषय-पवमान सोम (Various rshis, topic - Pavamana Soma)
Mandala 10	191	1754	त्रित, विमद, इन्द्र, श्रद्धा कामायनी, इन्द्राणी, शची, उर्वशी आदि। (Trita, Vimada, Indra, Shraddha Kamayani, Indrani, Shachi, Urvashi etc)
Total	1017	10472
Valakhilya Suktas (Mandala 8)	11	80
Total	1028	10552

Some important points about the arrangement of the mantras are as follows.

• First and tenth mandalas exactly have 191 suktas. They are said to be more recent as compared to other mandalas. Analysis of the modernity of the language and chandas used, and invocations to new devatas, along with new darshanika concepts forms the basis to say that of all the mandalas the tenth mandala is the most recent having new mantras.
• वंशमण्डल - Second to eight mandalas have complete unity in authorship. Mandalas second to sixth are have rshis Grtsamada, Vishvamitra, Vaamadeva, Atri, Bharadvaja, respectively and their families as the mantra-drashtas. The seventh mandala is given entirely by Vasishta. The eight mandala is predominantly given by rshis Kanva and Angiras.
• पवमानमण्डल - Ninth mandala is made up of suktas addressed to Soma Pavamana; its mantra drsthas belong to rshis of different families. In this mandala the rshis belonging to the Vamsha-mandala have also contributed suktas.
• Except in the eighth and ninth mandalas, everywhere the suktas to Agni are placed first, then those of Indra followed by those addressed to other deities are seen.
• Simple chandas, having three or four lines of eight, eleven and twelve syllables as well as some complicated chandas are seen in Rigveda.

There are some criteria on which the arrangement of mantras is based on. They are as follows.

1. The suktas and mantras associated with rshi-families (ऋषि-परिवार) are first collected and grouped. Thus we see the vamsha-mandalas 2 to 7 are compiled first. They have only one rshi-family as the mantra-drashtas. The eighth mandala has rshis of two families as mantra-drashtas.
2. The mantras revealed by one rshi are placed in one place to a great extent.
3. Arrangement is organized such that there is unity of the subject matter.
4. The subject matter about Soma (Pavamana Soma) is large hence the mantras and suktas have been compiled together even if compiled by different rshis.
5. In arranging the suktas, the following order has been followed - Agni, Indra, Vishvedevas, Maruts, Ashvini devatas, Mitravaruna etc.
6. The order of Chandas appears to be as follows - Gayatri, Trishtup, Jagati, Anushtup, and Pankti. These chandas have been used in the Rigveda.
7. After this arrangement, the rshi families which have been left over are covered in the beginning or the end of the text. Additional attention has been given to place the suktas or mantras of those rshi-families which are greater in number, in the Mandala 1. Moreover, the number of suktas in Mandalas 1 and 10 have same number of suktas (192).
8. Mandala 1 has the following rshis or their family members -
   1. Suktas 1 - 11: Madhu-chandas
   2. Suktas 12 - 23: Medhatithi-kanva
   3. Suktas 31 to 35: Hiranyasthupa Angirasa
   4. Suktas 36 - 50: Kanva or his family members
   5. Suktas 51 - 57: Savya Angirasa
   6. Suktas 58 - 64 and 74 - 93: Gautama or his family members
   7. Suktas 94 - 114: Kutsa Angirasa
   8. Suktas 116 - 126 and 140 - 164: Deerghatamas and his family members
   9. Suktas 165 - 191: Agasthya

The internal arrangement within a mandala places the mantras given by the father (rshi) first and followed by those given by the son. However, in a few cases the mantras given by the son are arranged earlier than the sukta of the father, because the son had given more suktas than the father.

अष्टकक्रमः ॥ Ashtaka krama

In the Ashtaka krama, eight ashtakas, each ashtaka has 8 adhyayas thus a total of 64 adhyayas, 2006 vargas are present. Here vargas are the collection of mantras compiled in this arrangement to facilitate convenience while studying. The number of mantras in a varga are not definite, but containing at least 5 mantras in a varga. In the end of the Samhita, we find the Rk Parishista in which 36 suktas are collected. Given below are the number of vargas and mantras according to the Ashtaka krama.

Ashtakas	Number of Suktas	Number of Vargas	Mantra
Ashtaka 1	121	265	1370
Ashtaka 2	119	221	1147
Ashtaka 3	122	225	1209
Ashtaka 4	140	250	1289
Ashtaka 5	129	238	1263
Ashtaka 6	124	313	1650
Ashtaka 7	116	248	1263
Ashtaka 8	146	246	1281
Total	1017	2006	10472
Valakhilya	11	18	80
Total	1028	2024	10552

Rgveda Samhitas

Charanavyuha of Saunaka enumerates five principle shakas of the Rigveda, namely, Shakala, Baskala (Vaskala), Ashvalayana, Shankhayana and Mandukeya. Each of which had a sutra of its own. The extant and available samhita of Rgveda belongs to the Shakala shaka. It is the only available samhita of Rgveda. It is popular from ancient times which preserved the best tradition of this veda. Bashkala, Ashvalayana, Shankhyayana, Mandukayana, shaka samhitas are not available in present times. Rigveda is also called Bahvrcha, for many rks are incorporated in it.

शाकल संहिता Shakala Samhita

Shakalya (शाकल्यः)

Padapatha of Rgveda samhita was given by Shakalya (शाकल्यः). In the Brhdaranyaka Upanishad (Adhyaya 4) we find a debate between Shakalya and Yajnavalkya in Janaka's sabha. According to the Puranic evidences, it was this same Shakalya who composed the Rgveda Padapatha. In the Brahmanda Purana we find the following

शाकल्यः प्रथमस्तेषां तस्मादन्यो रथीतरः ।। बाष्कलिश्च भरद्वाज इति शाखाप्रवर्त्तकाः ।। ३४.३२ ।। देवमित्रस्तु शाकल्यो ज्ञानाहंकारगर्वितः ।। जनकस्य स यज्ञे वै विनाशामगमद्द्विजाः ।। ३४.३३ ।। (Brahmanda. Pura. Purv. 2.34.32-33)

Reference to Shakalya has also been found in Nirukta and Rk-Pratisakhya. It has been shown that Shakalya's padapatha has not been accepted by Yaska in his Nirukta. For example in Nirukta (5.21) "अरुणो मासकृद् वृकः" has been mentioned. Yaska interpreted मासकृत् as one word in the sense of "मासो का कर्ता" or one who makes a month. Shakalya considered it as two padas or words as मा and सकृत्. Thus we see how Yaska and Shakalya differed in their interpretations.

विषयविवेचन ॥ Contents of Rgveda

Rgveda is a vast collection of stotras, where many devatas are praised and eulogized by various rshis and their family using beautiful comparisons and emotional expressions, both to please the devatas as well as to achieve their wishes. We find numerous references to geography, descriptions about the three worlds (पृथ्वी or the earth, अन्तरिक्षम् or द्युलोकः referred to as the outer space including the atmosphere and स्वर्गः refers to the higher worlds loosely translated as heaven) the devatas, rivers and oceans, countries, asuras or dasyus, and socio-economic conditions of people, the society, marriage, lifestyle, occupations, construction of villages and cities, rulers of countries and wars, dialogue suktas such as that of Sarama and Pani, and the darshanika suktas to name a few.

The tenth mandala includes mantras of miscellaneous character that covers a wide range of topics from cosmology, philosophical speculations, burial rites, samvada suktas, weddings to spells and incantations.

Thus, we have many topics discussed in the Rgveda, however, some are debated in the recent centuries. One such topic is the geographical point concerning Bharatavarsha that is surrounded by four oceans or very large water bodies. The other being the river Sarasvati. The presence of four seas has been clearly mentioned only in the Bharatiya vaidika sahitya and rarely discussed in other ancient world literatures. Many scholars, both western and the traditional scholars have given their perspectives interpreting those Rgvedic mantras relating them to the "Aryan settlements" along the banks of the rivers in the northwestern region of India. With the myth of the Aryan Invasion debunked, we see much research evolving lately regarding the geographic aspects given in the Rgveda.

Thus we find many astronomical, geographical, and geological aspects of importance along with description of nature, socio-economic aspects and darshanik aspects that are valid in the present day society.

Astronomical aspects

In the Aitareya Brahmana (3.44) we find the concept that Sun (Surya) never raises or sets but it only flips at the end of daylight and returns with the bright side up on the next day. On reaching the end of the day, the sun flips such that the dark night side faces us. This concept was agreeable in the Rgveda suktas also (1.115.4 and 5.81.4). And that the earth was circular like a discus was known to the people in those times.

Geological aspects

According to Dr. Kapil Dev Dwivedi many interesting geological aspects are revealed during the study of Rgveda. It was long known to ancient people that the earth has 7 strata (Rgveda 1.22.16), and that the movements within both the earth and in the paramanus (atoms) are regulated by Vishnu.

Rgveda (10.1.6) states that the core of the earth is filled with Agni covered by a brilliant cloak.

स तु वस्राण्यध पेशनानि वसानो अग्निर्नाभा पृथिव्याः ॥ (Rg. Veda. 10.1.6)

The concept of fire and its tejas (तेजोमय वस्त्र) the brilliant cloak or garment is expressed in many mantras. Yajurveda also states that prthvi or earth is the center (yoni) of agni and it is due to this central Agni that causes the movement of the earth. Atharvaveda states that Agni is present in the Earth, अग्निवासाः पृथ्विवी (Atha. Veda. 12.1.21) and hence prthvi is called Agnivaasas (अग्निवासस्). That the rivers and ocean waters contain Agni is also expressed in the Rgveda. Agni is present in all living beings and the same is said to spread into the waters of rivers and oceans.

यो अग्निः सप्तमानुषाः श्रितो विश्वेषु सिन्धुषु ॥ (Rg. Veda. 8.39.8)

In the above mantra Sindhu (सिन्धु) indicates both the rivers and oceans. It is said that Agni exists in the waters and it is well known that by the churning of the river water electricity is generated. Rgveda clearly mentions the presence of Ratnas (gems) and treasures of gold etc which are the cause of prosperity, in the earth.

रियं त इन्द्र पृथिवी बिभर्ति ॥ (Rg. Veda. 3.55.22) पुरू वसूनि पृथिवी बिभर्ति ॥ (Rg. Veda. 3.51.5)

Nature in Rgveda

The main part of Rigveda belongs to suktas related to nature and natural forces. The Vedic deities are explained in different ways by the scholars of India and West, but speaking generally, the suktas addressed to deities (Devata) are under the influence of the most impressive phenomenon of nature and its aspects. The word Devata means divine, divinity which is bright, strong, donor, and powerful. In these suktas we find prayers for certain natural elements such as air, water, earth, sun, rain, dawn etc. The glorious brightness of the sun, the blaze of the sacrificial fire, the sweep of the rain-storm across the skies, the recurrence of the dawn, the steady currents of the winds, the violence of the tropical storm and other such natural energies, fundamental activities or aspects are glorified and personified as divinities (Devata).

The interaction with nature resulted in appreciation and prayer but, indeed, after a good deal of observation. Attributes assigned to deities fit in their natural forms and activities, as Soma is green, fire is bright, air is fast moving and sun is dispenser of darkness. The characteristics of these forces described in the mantras prove that Vedic seers were masters of natural science. All powers, aspects or activities of nature are generally regarded as deities because they are helpful, beneficial and essential for our life. Rivers, mountains, earth, air, water, plants, trees, forest, fire, rain, cloud, Sun, Moon etc, all are deities in Vedic mythology. In Rigveda the names of major deities are, such as Agni, Indra, Vayu, Earth, Soma, Varuna, Vishnu, Aditya, Usha, Aditi, Parjanya, etc. They are indeed the natural instruments of wealth - the inner earth crust, Surya and the other grahas, medicinal plants, oceans and rivers, water bodies such as waterfalls and forests.

इन्द्राय द्याव ओषधीरुतापो रियं रक्षन्ति जीरयो वनानि ॥ (Rg. Veda. 3.51.5)

Darshanika Tattva

In the 10th mandala of Rgveda we find many suktas portraying darshanika aspects of Indian tattvajnana. In fact they are seen as the precursor to the siddhantas laid out in the Shad Darshanas. The darshanika aspect, according to some scholars, also supports the fact that the 10th mandala is a more recent addition to the Rgveda as it is very contrary to the stuti-presentation given in the rest of the mandalas. The two most important references are the Nasadiya Sukta and Purusha Sukta. Purusha sukta propounds Sarveshvara-vada (the all-pervading characteristic) which is considered as a modern thought process, a concept which discusses an all-permeating image or form (Saakara, aakruti) of the Supreme Self in the universe. According to some western scholars, spiritual development has the following course - Bahudevata-vada, Ekadevata-vada and Sarveshvara-vada. The oldest times witness worship of many deities, which later led to worship of one deity (Prajapati or Hiranyagarbha). This further led to development of faith in all-pervading deity, a more recent concept.

अयँ लोक ऋग्वेदः। (Shad. Brah. 1.5)

According to Shadvimsha Brahmana, Rgveda is said to be the bhuloka and Agni is the important devata. In the same Brahmana, Yajurveda is said to have Vayu as the important devata (of the Antariksha loka) while Surya is the important deity of Samaveda (of Dyuloka). Manusmrti reinforces that

अग्निवायुरविभ्यस्तु त्र्यं ब्रह्म सनातनम। दुदोह यज्ञसिध्यर्थमृग्यजुः सामलक्षणम्॥ (Manu. Smrt. 1.13)

From Agni, Vayu and Surya, was milked the eternal Rigveda, Yajurveda and Samaveda respectively for the performance of yajnas. Rgveda involves the Vaktattva or speech aspects (including knowledge and contemplation), Yajurveda involves Manastattva or psychological aspects (personality, action, nature), and Samaveda includes Pranatattava or energy balance aspects (strength, cooperation). A coordination of the three tattavatas leads a person to attain Brahman.

ब्रह्म वा ऋक् । अमृतं वा ऋक् । (Kous. Brah. 7.10) प्राणो वा ऋक्। (Jaim. Brah. 1.112)

Above such references in various brahmanas portray the darshanik aspects (philosophical) of Rgveda. We find information about Brahman, Vak (Speech), Prana (energy), Amruta (eternity), Veerya (propagation) etc. Thus, we find the description about attaining Brahman, the shabda Brahman (vaktattva), Prana or the energy, means to attain Amaratva (eternity), and magnificence by practicing Brahmacharya.

Darshanika Suktas found in Rgveda include

1. Nasadiya Sukta (नासदीयसूक्तम्)
2. Purusha Sukta (पुरुषसूक्तम्)
3. Hiranyagarbha Sukta (हिरण्यगर्भसूक्तम्)
4. Vak Sukta (वाक् सूक्तम्)

प्रख्यात आख्यान । Famous Akhyanas

There are many akhyanas or anecdotes in Rgveda. A few are famous and are found in Brahmana and other texts such as Brhaddevata.

Shunahshepa (1.24 and 30)

Brahmavadini Apala (8.91)

Urvashi Pururava Samvada (10.85)

Yama Yami Samvada (10.10)

Sarama Pani Samvada (10.130)

Sobhari Kanva (8.29, 8.81)

Atreya (5.61)

Pravachanakaras of Rgveda

One may classify the Samskrit commentators of the Rgveda into the following five main categories :

• those commentators whose commentaries are now available in full in published form; Sayanacharya (1316-1388) alone can be cited as an example in this category. His commentary on Rgveda is called Vedarthaprakasa.
• those commentators who can be reasonably presumed to have written commentaries on the entire Rgveda but only some portions of whose commentaries have become available so far; Skandaswamin (around 600 AD). He named his commentary as Rgarthaagamasamhrti. Venkatamadhava (1100 AD) composed Rgarthadipika. According to Venkatamadhava Skandaswamin, Narayana and Udgitha together composed the Rgbhashya respectively, i.e., the first part was by Skandaswamin, the middle part by Narayana and the ending was given by Udgitha.
• स्कन्दस्वामी नारायण उद्गीथ इति ते क्रमात् । चक्रुः सहैकमृग्भाष्यं पदवाक्यार्थगोचरम् ।।

• those persons who are known to have written commentaries only on certain specific mantras of the Rgveda; commentators. Haradatta (9th century A.D.) wrote the commentary called Asvalayana-mantra-patha-bhashya. Anandatirtha (Madhavaacharya) has written a commentary on Rgveda1.1-40 (except 1.34.7-12). Atmananda (around 13th Century) has commented on only one sukta namely 1.164. Dinakara Bhatta in his Rgarthasara has given his commentary on 207 mantras of the Rgveda.
• those persons who are directly or indirectly referred to in literature as commentators of the Rgveda but no portions of whose commentaries have become available so far; Narayana and Udgitha
• the Rgveda-commentators of the modern times.

Most commentators have interpreted Rgveda mainly in the light of the Vedic rituals.