Mbh 12.218.2a

"'Bhishma said, "In this connection is cited the following old narrative of the particular conduct by which that ruler, thoroughly conversant with all courses of conduct, succeeded in achieving the highest felicity. There was a ruler in Mithila of the name of Janadeva of Janaka's race. He was ever engaged in reflecting upon the courses of conduct that might lead to the attainment of Brahma. A century of preceptors always used to live in his palace, lecturing him upon the diverse courses of duty followed by people who had betaken themselves to diverse modes of life.[793] Given to the study of the Vedas, he was not very well satisfied with the speculations of his instructors on the character of the Soul, and in their doctrines of extinction upon the dissolution of the body or of rebirth after death. Once upon a time a great ascetic of the name of Panchasikha, the son of Kapila, having roamed over the whole world, arrived at Mithila. Endued with correct conclusions in respect of all speculations about the diverse duties connected with renunciation, he was above all pairs of opposites (such as heat and cold, happiness and misery), and of doubts he had none. He was regarded as the foremost of Rishis. Dwelling wherever he pleased, he desired to place before the reach of all men eternal felicity that is so difficult of attainment. 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.[794] 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.