Bhagavad Gita 8.18 Chapter 8, Verse 18

अव्यक्ताद्व्यक्तयः सर्वाः प्रभवन्त्यहरागमे ।
रात्र्यागमे प्रलीयन्ते तत्रैवाव्यक्तसंज्ञके ॥८.१८॥

avyaktādvyaktayaḥ sarvāḥ prabhavantyaharāgame
rātryāgame pralīyante tatraivāvyaktasaṃjñake

Meaning

At the coming of Brahma's day, all manifest things emerge from the unmanifest; at the coming of his night, they dissolve into that same unmanifest.

Newly written by Bhajan Dhun — scholarly review in progress.

Reference: Bhagavad Gita 8.18 (Chapter 8, The Yoga of the Imperishable Absolute, Verse 18)