Mbh 5.108.1a

“‘Garuda said, “O Galava, commanded I have been by God, who is the cause of all knowledge. I ask thee, towards which quarter shall I first take thee to see what lie there? The eastern, the southern, the western, or the northern, towards which, O best of regenerate persons, shall I go, O Galava? That quarter towards which Surya the illuminator of the universe first riseth; where, at eve, the Sadhyas engage in their ascetic austerities; where that Intelligence, which pervades the whole universe first springeth; where the two eyes of Dharma, as well as he himself, are stationed; where the clarified butter first poured in sacrifice subsequently flowed all around; that quarter, O best of all regenerate persons, is the gate of Day and Time. There the daughters of Daksha, in primeval times, gave birth to their children. There the sons of Kasyapa first multiplied. That quarter is the source of all the prosperity of the gods, for it was there that Sakra was first anointed as the king of the celestials. It was there, O regenerate Rishi, that both Indra and the gods underwent their ascetic penances. It is for this, O Brahmana, that this quarter is called Purva (the first). And because in the earliest of times this quarter was overspread by the Suras, it is for this that it is called Purva. The gods, desirous of prosperity, performed all their religious ceremonies here. It was here that the divine Creator of the universe first sang the Vedas. It was here that the Gayatri was first preached by Surya unto the reciters of that sacred hymn. It was here, O best of Brahmanas, that the Yajurvedas were delivered by Surya (unto Yajnavalkya). It was here that the Soma juice, sanctified by boons, was first drunk in sacrifices by Suras. It was here that the Homa-fires, (gratified by mantras), first drank articles of cognate origin.[13] It was here that Varuna first repaired to the nether regions, and attained to all his prosperity.