Mahabharata 12.211.9

12.211.9

yamāhuḥ kapilaṃ sāṃkhyāḥ paramarṣiṃ prajāpatim |
sa manye tena rūpeṇa vismāpayati hi svayam || 9 ||

It seemed that he went about, amazing the world, having assumed the form of none else than that great Rishi, that lord of creatures, whom the followers of the Sankhya doctrine knew by the name of Kapila. He was the foremost of all the disciples of Asuri and was called the undying. He had performed a mental Sacrifice that had lasted for thousand years. He was firm in mind, and had completed all the rites and sacrifices that are enjoined in the scriptures and that lead to the attainment of Brahma. He was fully conversant with the five sheaths that cover the soul. He was devoted to the five acts connected with the adoration of Brahma, and had the five qualities (of tranquillity, self-restraint, etc.). Known (as already said) by the name of Panchasikha, he had approached one day a large concourse of Rishis following the Sankhya doctrines and enquired of them about the highest object of human acquisition, viz., the Unmanifest or that upon which the five Purushas or sheaths (already named) rest. For the sake of obtaining a knowledge of the Soul, Asuri had enquired of his preceptor. In consequence of the latter's instructions and of his own penances, Asuri understood the distinction between the body and the Soul and had acquired celestial vision. In that concourse of ascetics, Asuri made his exposition of the Immutable One, and Indestructible Brahma which is seen in diverse forms. Panchasikha became a disciple of Asuri. He lived on human milk.