Bhagwad Gita
Chapter 8, Verse 19
भूतग्रामः स एवायं भूत्वा भूत्वा प्रलीयते।
रात्र्यागमेऽवशः पार्थ प्रभवत्यहरागमे।।8.19।।
Again and again the day comes, and this host of beings is active; and again the night falls, O Partha, and they are helplessly dissolved.