What did the legendary Quetzalcoatl promise to do after he fled from his evil brother?

After fleeing from his evil brother, Quetzalcoatl promised to return to his people to bring them knowledge, culture, and prosperity. He vowed to teach them about agriculture, art, and civilization. His departure was marked by a promise of eventual return, which instilled hope among his followers. This prophecy significantly influenced Mesoamerican cultures, particularly the Aztecs, who awaited his return.