Bhagavad Gita 8.18
अव्यक्ताद्व्यक्तयः सर्वाः प्रभवन्त्यहरागमे। रात्र्यागमे प्रलीयन्ते तत्रैवाव्यक्तसंज्ञके।।8.18।।
avyaktādvyaktayaḥ sarvāḥ prabhavantyaharāgame| rātryāgame pralīyante tatraivāvyaktasaṃjñake||8.18||
avyaktadvyaktayah sarvah prabhavantyaharagame ratryagame praliyante tatraivavyaktasamjnake8.18
Meaning
At the dawn of Brahma's day, all living beings emerge from the unmanifest state. At the fall of his night, they merge back into the unmanifest. This cosmic cycle of creation and dissolution continues endlessly.
दिन का उदय होने पर अव्यक्त से व्यक्त उत्पन्न होता है; और रात्रि के आगमन पर उसी अव्यक्त में लीन हो जाता है।
This is verse 18 of 28 in Chapter 8 (Aksara Brahma Yoga) of the Bhagavad Gita.