Devibhagavatapurana 10.1.7

10.1.7

āvirāsīnnābhipadmāddevadevasya cakriṇaḥ |
sa caturmukha āsādya prādurbhāvaṃ mahāmate ||

The four faced Brahmâ, on being born, produced from His mind Svâyambhuva Manu and his wife S’atarûpâ, the embodiment of all virtues. For this very reason, Svâyambbuva Manu has been known as the mind-born son of Brahmâ. Svâyambhuva Manu got from Brahmâ the task to create and multiply; he made an earthen image of the Devî Bhagavatî, the Bestower of all fortunes, on the beach of the sanctifying Ksîra Samudra (ocean of milk) and he engaged himself in worshipping Her and began to repeat the principal mystic mantra of Vâgbhava (the Deity of Speech). Thus engaged in worship, Svâyambhuva Manu conquered by and by his breath and food and observed Yama, Niyama and other vows and became lean and thin. For one hundred years he remained standing always on one leg and became successful in controlling his six passions lust, anger, etc. He meditated on the feet of that Âdyâ S'akti (the Primordial S'akti) so much that he became inert like a vegetable or mineral matter. By his Tapas the Devî, the World Mother appeared before him and said:-- “O King! Ask divine boons from Me.” Hearing these joyous words, the King wanted his long cherished and heart-felt boon, so very rare to the Devas.