Bhagavad Gita, Chapter 8, Verse 20

But beyond this unmanifested, there is that other Unmanifested, Eternal Existence, that which is not destroyed at the destruction of all beings.

Beyond even that whole vast cycle, there's still described as something real that genuinely never ends.

This introduces a real third category, beyond the material cycle entirely. Everything described so far, however vast, still cycles, but this dimension is described as standing genuinely outside that pattern altogether.