Mbh 12.244.2c

The Vaikhanasas, the Valikhilyas, the Saikatas, all of whom were devoted to austere penances,[1012] who were steadfast in virtue, who had subdued their senses, and who used to behold the fruits of their penances immediately, adopted this mode of life and finally ascended to heaven. Freed from fear and not counted among the stars and planets, these have become visible in the firmament as luminous bodies.[1013] When the fourth or last part of life is reached, and when one is weakened by decrepitude and afflicted by disease, one should abandon the forest mode of life (for the fourth mode called Renunciation). Performing a sacrifice that is capable of being completed in a single day and in which the Dakshina should be everything of which he may be possessed, he should himself perform his own Sraddha. Withdrawn from every other object, he should devote himself to his own self, taking pleasure in himself, and resting also on his own self.[1014] He should establish all his sacrificial fires (thenceforth) upon his own self, and give up all kinds of ties and attachments. (In case he fails to attain to complete Renunciation) he should always perform such sacrifices and rites as are completed in a single day.[1015] When, however, from performance of the (ordinary) sacrifices of sacrificers, the Sacrifice in Self proceeds, then (may he discontinue all ordinary sacrifices, and) unto the three fires duly sacrifice in his own Self for the sake of his Emancipation.[1016] Without finding fault with his food he should eat five or six mouthfuls, offering them duly unto five vital airs uttering (every time the well-known) mantras of the Yajurveda.[1017] Engaged in the observance of austerities while leading the life of a forest recluse, one should shave off one's hair and bristles and pare off one's nails, and having cleansed oneself by acts, pass into the fourth and last mode of life that is fraught with great holiness.