Bhagavad Gita, Chapter 8, Verse 18

At the approach of Brahma's day, all manifestations proceed from the unmanifested state; at the approach of night, they merge verily into that alone, which is called the unmanifested.

Everything here moves in a real, recurring rhythm, emerging and returning, again and again.

This describes a genuine cycle, not a one-time event. Creation and dissolution are shown as a real, repeating pattern, the same underlying rhythm playing out on a genuinely vast scale.