Srimad Bhagavatam Canto 03, Chapter 11, Text 32

SB 3.11.32

antah sa tasmin salila
 aste ’nantasano harih
yoga-nidra-nimilaksah
 stuyamano janalayaih
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
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 by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
We should not understand the sleeping condition of the Lord to be the same as our sleep. Here the word yoga-nidra 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 Bhrgu.
Srimad Bhagavatam Canto 03, Chapter 11, Text 31
Srimad Bhagavatam Canto 03, Chapter 11, Text 33