Srimad Bhagavatam Canto 08, Chapter 24, Text 07

SB 8.24.7

asid atita-kalpante
 brahmo naimittiko layah
samudropaplutas tatra
 loka bhur-adayo nrpa
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
O King Pariksit, at the end of the past millennium, at the end of Brahma’s day, because Lord Brahma sleeps during the night, annihilation took place, and the three worlds were covered by the water of the ocean.
Srimad Bhagavatam Canto 08, Chapter 24, Text 06
Srimad Bhagavatam Canto 08, Chapter 24, Text 08