Question

Which is an epic poem about a ruler who rescues his captured wife and that grew to about 25,000 verses?

Answer 1

I beleive the answer is: Ramayana

Epic poem of Ramayana tell the story of Prince Rama's struggle to rescue his wife Sita from the demon king .
Due to the size of this epic poem, Ramayana is regarded as the largest ancient epics in literature world (it has more than 24,000 verses and 500 Chapters)