Who did Montezuma believe was the reincarnation from the god of quetzalcoal?

Montezuma II was the ruler of the city of Tenochtitlan when the Spanish conquerors made the first contact with the indigenous civilization of Mesoamerica. Some scholars as Bernardino de Sahagún assert that he received gladly and fearfully the Spanish explorers led by Hernan Cortes because he believed in prophecies that announced the arrival of God Quetzalcoatl, who was described as a white and bearded being.