Chapter 8 · The Imperishable Absolute · Krishna said
Bhagavad Gita 8.19 — The endless cycle
भूतग्रामः स एवायं भूत्वा भूत्वा प्रलीयते। रात्र्यागमेऽवशः पार्थ प्रभवत्यहरागमे ॥
bhūtagrāmaḥ sa evāyaṃ bhūtvā bhūtvā pralīyate | rātryāgame'vaśaḥ pārtha prabhavatyaharāgame ||
Meaning
This same multitude of beings, coming forth again and again, dissolves helplessly when night comes, Partha, and arises again when day comes.