Vishnupurana 1.13.83

1.13.83

na hi pūrvavisarge vai viṣame pṛthivītale /
pravībhāgaḥ purāṇāṃ vā grāmāṇāṃ vā purābhavāt //

Prithu accordingly uprooted the mountains, by hundreds and thousands, for myriads of leagues, and they were thenceforth piled upon one another. Before his time there were no defined boundaries of villages or towns, upon the irregular surface of the earth; there was no cultivation, no pasture, no agriculture, no highway for merchants: all these things (or all civilization) originated in the reign of Prithu. Where the ground was made level, the king induced his subjects to take up their abode. Before his time, also, the fruits and roots which constituted the food of the people were procured with great difficulty, all vegetables having been destroyed; and he therefore, having made Swáyambhuva Manu the calf, milked the Earth, and received the milk into his own hand, for the benefit of mankind. Thence proceeded all kinds of corn and vegetables upon which people subsist now and perpetually. By granting life to the Earth, Prithu was as her father, and she thence derived the patronymic appellation Prithiví (the daughter of Prithu). Then the gods, the sages, the demons, the Rákshasas, the Gandharbhas, Yakshas, Pitris, serpents, mountains, and trees, took a milking vessel suited to their kind, and milked the earth of appropriate milk, and the milker and the calf were both peculiar to their own species.