Srimad-Bhagavatam: Canto 3 - Chapter 1 - Verse 32

Sanskrit:

अन्त: स तस्मिन् सलिल आस्तेऽनन्तासनो हरि: ।योगनिद्रानिमीलाक्ष: स्तूयमानो जनालयै: ॥ ३२ ॥

ITRANS:

antaḥ sa tasmin salilaāste ’nantāsano hariḥyoga-nidrā-nimīlākṣaḥstūyamāno janālayaiḥ

Translation:

The Supreme Lord, the Personality of Godhead, lies down in the water on the seat of Ananta, with His eyes closed, and the inhabitants of the Janaloka planets offer unto the Lord their glorious prayers with folded hands.

Purport:

We should not understand the sleeping condition of the Lord to be the same as our sleep. Here the word yoga-nidrā is specifically mentioned, which indicates that the Lord’s sleeping condition is also a manifestation of His internal potency. Whenever the word yoga is used it should be understood to refer to that which is transcendental. In the transcendental stage all activities are always present, and they are glorified by prayers of great sages like Bhṛgu.