Matsya Purana 246.66

246.66

kṛtvā rūpaṃ mahākāyaṃ jahārāśu sa medinīm.
tasya vikramato bhūmiṃ candrādityau stanāntare .. 246.66 ..

Thus, to protect the Devas, He spread His vast Form and He measured the earth in the twinkling of an eye Then the Sun and the Moon came in a line with His breast, and when He brought out his third foot, they fell in a line with His thighs, when He started measuring the still more higher regions They reached His knees Thus the mighty Divine form of Viṣṇu spread all over and conquered all the three realms and killed the great Asuras for the benefit of the Devas He triumphed over all the demons and bestowed the three realms on Indra, and gave the lower region of Sutala to Bali to live in and said "King Bali! since you have given Me a gift which I have accepted therefore you will live a good long life for a Kalpa After Vaivasvata Manu is succeeded by Sâvarṇi Manu, you will become Indra—66-72