The Great Epic of the Bhārata dynasty 1.81.11

1.81.11

anteṣu sa vinikṣipya putrānyadupurogamān |
phalamūlāśano rājā vane saṃnyavasacciram || 11 ||

"King Yayati, the son of Nahusha, having installed his youngest son, Puru, on the throne after casting his sons with Yadu for their eldest amongst the Mlechchhas, entered the forest to lead the life of a hermit. And the king eating fruits and roots lived for some time in the forest. Having his mind and passions under complete control, the king gratified by sacrifices the Pitris and the gods. And he poured libations of clarified butter upon the fire according to the rites prescribed for those leading the Vanaprastha mode of life. And the illustrious one entertained guests and strangers with the fruit of the forest and clarified butter, while he himself supported life by gleaning scattered corn seeds. And the king; led this sort of life for a full thousand years. And observing the vow of silence and with mind under complete control he passed one full year, living upon air alone and without sleep. And he passed another year practising the severest austerities in the midst of four fires around and the Sun overhead. And, living upon air alone, he stood erect upon one leg for six months. And the king of sacred deeds ascended to heaven, covering heaven as well as the Earth (with the fame of his achievements).'"