1.The word ‘Chandas’, at first is observed in the Puruṣasūkta of the ṚgVeda (10.90.9) as ‘Chandāṁsi jajñire tasmāt’. Furthermore, in hymn 130, metres such as Gāyatrī are mentioned.
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# The word ‘Chandas’, at first is observed in the Purusha Sukta of the Rgveda as छन्दांसि जज्ञिरे तस्मात् |<ref>Rgveda, Mandala 10, [https://sa.wikisource.org/wiki/%E0%A4%8B%E0%A4%97%E0%A5%8D%E0%A4%B5%E0%A5%87%E0%A4%A6%E0%A4%83_%E0%A4%B8%E0%A5%82%E0%A4%95%E0%A5%8D%E0%A4%A4%E0%A4%82_%E0%A5%A7%E0%A5%A6.%E0%A5%AF%E0%A5%A6 Sukta 90].</ref> ''chandāṁsi jajñire tasmāt |'' (10.90.9). Furthermore, in sukta 130<ref>Rgveda, Mandala 10, [https://sa.wikisource.org/wiki/%E0%A4%8B%E0%A4%97%E0%A5%8D%E0%A4%B5%E0%A5%87%E0%A4%A6%E0%A4%83_%E0%A4%B8%E0%A5%82%E0%A4%95%E0%A5%8D%E0%A4%A4%E0%A4%82_%E0%A5%A7%E0%A5%A6.%E0%A5%A7%E0%A5%A9%E0%A5%A6 Sukta 130].</ref>, metres such as Gayatri are mentioned.
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# Sayanacharya has stated that the Chandas derives its name because of its act of enveloping the papa (wrong deeds) of people. पुरुषस्य पापसम्बन्धं वारयितुमाच्छादकत्वात् छन्द इत्युच्यते । ṚgVeda Sāyaṇabhāṣya, Preface, p.32.
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2. Sāyaṇācārya has stated that the Chandas derives its name because of its act of enveloping the sins of people.