The Draconic Prophecy is a body of cryptic prophecies, carefully guarded by the dragons of Argonnesson. No copies are known to be held by humans. Many of the dragons are deeply interested in studying the prophecies and understanding them.
The bits of it that are known are have come from a few sources. A dragon told them, thinking the person would stay with them for the remainder of the non-dragons life, but they eventually managed to leave/escape.
The information is inconsistent, and at least some of it is probably lies invented by the dragon.