The Call of the Prophets

The Call of the Prophets was a piece of Bajoran literature written by famous poet Akorem Laan. It was greatly influential but it was unfinished as its author disappeared before completing it.

When Akorem Laan re-entered the Bajoran wormhole and he was returned to his timeline, the Call of the Prophets was completed which was a sign that Akorem Laan had returned to his time. This minor temporal paradox was only noticeable to Kira Nerys. (DS9 episode: Accession)