Bhagavatapurana 3.7.21

3.7.21

sṛṣṭvāgre mahad-ādīni sa-vikārāṇy anukramāt /
tebhyo virājam uddhṛtya tam anu prāviśad vibhuḥ //

21. (It has been said that) having in the beginning created Mahat-tattva and other principles with their (gross) modifications in due order, and having formed Virat (Anda) out of them, the Lord entered into it (him);