The Shiva Purana tells the story of how Maharshi Atri and Anasuya were responsible for getting the holy river Ganga to flow down to earth. Atri maharshi was performing penance in Chitrakuta when a severe drought prevailed for many many years. All the rshis and disciples left the ashram and Anasuya continued her service to her husband. Seeing their devotion Shiva and Gangadevi arrived and stayed with them. <blockquote>स्वामिनः सेवनं दृष्ट्वा शिवस्य च परात्मनः ।। साध्वि धर्मं च ते दृष्ट्वा स्थितास्मि तव सन्निधौ ।।९।। (Shiv. Pura. 4.4.9)<ref>Shiva Purana (Samhita 4 (Kotirudrasamhita) [https://sa.wikisource.org/wiki/%E0%A4%B6%E0%A4%BF%E0%A4%B5%E0%A4%AA%E0%A5%81%E0%A4%B0%E0%A4%BE%E0%A4%A3%E0%A4%AE%E0%A5%8D/%E0%A4%B8%E0%A4%82%E0%A4%B9%E0%A4%BF%E0%A4%A4%E0%A4%BE_%E0%A5%AA_(%E0%A4%95%E0%A5%8B%E0%A4%9F%E0%A4%BF%E0%A4%B0%E0%A5%81%E0%A4%A6%E0%A5%8D%E0%A4%B0%E0%A4%B8%E0%A4%82%E0%A4%B9%E0%A4%BF%E0%A4%A4%E0%A4%BE)/%E0%A4%85%E0%A4%A7%E0%A5%8D%E0%A4%AF%E0%A4%BE%E0%A4%AF%E0%A4%83_%E0%A5%A6%E0%A5%AA Adhyaya 4])</ref></blockquote><blockquote>''svāminaḥ sevanaṁ dr̥ṣṭvā śivasya ca parātmanaḥ ।। sādhvi dharmaṁ ca te dr̥ṣṭvā sthitāsmi tava sannidhau ।।9।।''</blockquote>Once Atri woke up from his meditation and asks for water. Anasuya with an intention goes out to fetch the water knowing well that there was drought. Ganga appears before her to help her and Anasuya requests her for water. Dig a pit and take the water she says. Happily Anasuya takes the water and gives it to Atri. Surprised at getting water, he asks to see the water pit. Gangadevi asks Anasuya to part with one year's merit accrued by worship of Shiva when the couple ask her to permanently stay in their ashram. Anasuya for the welfare of the world passed on one year's merit to Ganga. Pleased with them, Shiva appeared in the form of a linga, and at their ardent request took his seat there permanently by assuming the name Atrishvara (Shiva Purana. Kotirudrasamhita. Adhyaya 3 and 4. Page 1265)<ref>Board of Scholars (1969 First Edition) ''The Siva Purana, Part 3.'' Delhi : Motilal Banarsidass Pvt. Ltd. ([https://archive.org/details/in.ernet.dli.2015.190673/page/n206 Adhyaya 3 Page 1265])</ref><ref name=":0" />
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The Shiva Purana tells the story of how Maharshi Atri and Anasuya were responsible for getting the holy river Ganga to flow down to earth. Atri maharshi was performing penance in Chitrakuta when a severe drought prevailed for many many years. All the rshis and disciples left the ashram and Anasuya continued her seva (सेवा | selfless service) to her husband. Seeing their devotion Shiva and Gangadevi arrived and stayed with them. <blockquote>स्वामिनः सेवनं दृष्ट्वा शिवस्य च परात्मनः ।। साध्वि धर्मं च ते दृष्ट्वा स्थितास्मि तव सन्निधौ ।।९।। (Shiv. Pura. 4.4.9)<ref>Shiva Purana (Samhita 4 (Kotirudrasamhita) [https://sa.wikisource.org/wiki/%E0%A4%B6%E0%A4%BF%E0%A4%B5%E0%A4%AA%E0%A5%81%E0%A4%B0%E0%A4%BE%E0%A4%A3%E0%A4%AE%E0%A5%8D/%E0%A4%B8%E0%A4%82%E0%A4%B9%E0%A4%BF%E0%A4%A4%E0%A4%BE_%E0%A5%AA_(%E0%A4%95%E0%A5%8B%E0%A4%9F%E0%A4%BF%E0%A4%B0%E0%A5%81%E0%A4%A6%E0%A5%8D%E0%A4%B0%E0%A4%B8%E0%A4%82%E0%A4%B9%E0%A4%BF%E0%A4%A4%E0%A4%BE)/%E0%A4%85%E0%A4%A7%E0%A5%8D%E0%A4%AF%E0%A4%BE%E0%A4%AF%E0%A4%83_%E0%A5%A6%E0%A5%AA Adhyaya 4])</ref></blockquote><blockquote>''svāminaḥ sevanaṁ dr̥ṣṭvā śivasya ca parātmanaḥ ।। sādhvi dharmaṁ ca te dr̥ṣṭvā sthitāsmi tava sannidhau ।।9।।''</blockquote>Once Atri woke up from his meditation and asks for water. Anasuya with an intention goes out to fetch the water knowing well that there was drought. Ganga appears before her to help her and Anasuya requests her for water. Dig a pit and take the water she says. Happily Anasuya takes the water and gives it to Atri. Surprised at getting water, he asks to see the water pit. Gangadevi asks Anasuya to part with one year's merit accrued by worship of Shiva when the couple ask her to permanently stay in their ashram. Anasuya for the welfare of the world passed on one year's merit to Ganga. Pleased with them, Shiva appeared in the form of a linga, and at their ardent request took his seat there permanently by assuming the name Atrishvara (Shiva Purana. Kotirudrasamhita. Adhyaya 3 and 4. Page 1265)<ref>Board of Scholars (1969 First Edition) ''The Siva Purana, Part 3.'' Delhi : Motilal Banarsidass Pvt. Ltd. ([https://archive.org/details/in.ernet.dli.2015.190673/page/n206 Adhyaya 3 Page 1265])</ref><ref name=":0" />
=== Atri assumes the forms of Surya and Chandra ===
=== Atri assumes the forms of Surya and Chandra ===