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

After fleeing from his evil brother, Quetzalcoatl, the legendary Mesoamerican deity, promised to return one day to bring enlightenment and prosperity to his people. He vowed to teach them civilization, including agriculture, art, and knowledge. His departure was marked by a promise of a future return, which deeply influenced the mythology and expectations of various Mesoamerican cultures. This theme of return contributed to the complex interactions between these cultures and the Spanish conquistadors.