Śrīmad-Bhāgavatam 3.20.15
SB 3.20.15
Open the full passageSanskrit
so 'śayiṣṭābdhi-salile āṇḍakośo nirātmakaḥ sāgraṁ vai varṣa-sāhasram anvavātsīt tam īśvaraḥ
Translation
For over one thousand years the shiny egg lay on the waters of the Causal Ocean in the lifeless state. Then the Lord entered it as Garbhodakaśāyī Viṣṇu.