Though in Mahabharata, a total of seven sons are mentioned, namely: 1) Aniruddha, 2) Sana, 3) Sanatsujata, 4) Sanaka, 5) Sanandana, 6) Sanatkumara and 7) Sanatana and further mentions that, "Knowledge comes to these seven rishis, of itself (without being dependent on study or exertion). These seven are wedded to the path of Nivritti (inward contemplation)
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