Chapter 8 · verse 19 · gita.yoga.org

Bhagavad Gita 8.19

भूतग्रामः स एवायं भूत्वा भूत्वा प्रलीयते। रात्र्यागमेऽवशः पार्थ प्रभवत्यहरागमे

This same multitude of beings, being born again and again, helplessly dissolves, O Arjuna, into the Unmanifested at the coming of the night and comes forth at the coming of the day.