Bhagavatapurana 3.8.10

3.8.10

udāplutaṃ viśvam idaṃ tadāsīd yan nidrayāmīlita-dṛṅ nyamīlayat /
ahīndra-talpe 'dhiśayāna ekaḥ kṛta-kṣaṇaḥ svātma-ratau nirīhaḥ //

10. When the whole universe was immersed in water, Narayana whose vision is never interrupted, shut his eyes lying on his bed of Sesha, the foremost among serpents, singly delighted in the realisation of His own blissful self, in a state of inaction.