Srimad-Bhagavatam: Canto 12 - Chapter 1 - Verse 3
Sanskrit:
तदन्ते प्रलयस्तावान् ब्राह्मी रात्रिरुदाहृता ।त्रयो लोका इमे तत्र कल्पन्ते प्रलयाय हि ॥ ३ ॥
ITRANS:
tad-ante pralayas tāvānbrāhmī rātrir udāhṛtātrayo lokā ime tatrakalpante pralayāya hi
Translation:
After one day of Brahmā, annihilation occurs during his night, which is of the same duration. At that time all the three planetary systems are subject to destruction.