Srimad Bhagavatam Canto 03, Chapter 07, Text 37

SB 3.7.37

tattvanam bhagavams tesam
 katidha pratisankramah
tatremam ka upasiran
 ka u svid anuserate
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
Please describe how many dissolutions there are for the elements of material nature and who survives after the dissolutions to serve the Lord while He is asleep.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
In the Brahma-samhita (5.47-48) it is said that all the material manifestations with innumerable universes appear and disappear with the breathing of Maha-Visnu lying in yoga-nidra, or mystic sleep.
yah karanarnava-jale bhajati sma yoga-
 nidram ananta-jagad-anda-saroma-kupah
adhara-saktim avalambya param sva-murtim
 govindam adi-purusam tam aham bhajami
yasyaika-nisvasita-kalam athavalambya
 jivanti loma-vilaja jagad-anda-nathah
visnur mahan sa iha yasya kala-viseso
 govindam adi-purusam tam aham bhajami
“Govinda, the ultimate and Supreme Personality of Godhead [Lord Krsna], lies sleeping unlimitedly on the Causal Ocean in order to create unlimited numbers of universes during that sleep. He lies on the water by His own internal potency, and I worship that original Supreme Godhead.
“Due to His breathing, innumerable universes come into existence, and when He withdraws His breath there occurs the dissolution of all the lords of the universes. That plenary portion of the Supreme Lord is called Maha-Visnu, and He is a part of the part of Lord Krsna. I worship Govinda, the original Lord.”
After the dissolution of the material manifestations, the Lord and His kingdom beyond the Causal Ocean do not disappear, nor do the inhabitants, the Lord’s associates. The associates of the Lord are far more numerous than the living entities who have forgotten the Lord due to material association. The impersonalist’s explanation of the word aham in the four verses of the original Bhagavatam — aham evasam evagre, etc. — is refuted here. The Lord and His eternal associates remain after the dissolution. Vidura’s inquiry about such persons is a clear indication of the existence of all the paraphernalia of the Lord. This is also confirmed in the Kasi-khanda, as quoted by both Jiva Gosvami and Srila Visvanatha Cakravarti, who follow in the footsteps of Srila Sridhara Svami.
na cyavante hi yad-bhakta
 mahatyam pralayapadi
ato ’cyuto ’khile loke
 sa ekah sarva-go ’vyayah
“The devotees of the Lord never annihilate their individual existences, not even after the dissolution of the entire cosmic manifestation. The Lord and the devotees who associate with Him are always eternal, in both the material and spiritual worlds.”
Srimad Bhagavatam Canto 03, Chapter 07, Text 36
Srimad Bhagavatam Canto 03, Chapter 07, Text 38