Bhagavatapurana 10.3.31

10.3.31

viśvaṃ yad etat sva-tanau niśānte yathāvakāśaṃ puruṣaḥ paro bhavān /
bibharti so 'yaṃ mama garbhago 'bhūd aho nṛ-lokasya viḍambanaṃ hi tat //

31. Thou art that Perfect Person who in His own personality holds all this Universe in fullest extent at the end of the night (during Pralaya); that the Almighty Lord was in my womb is a most wonderful act of imitating the mortal world.