 Aeson sent Jason to Chiron to be educated while Pelias, afraid that he would be overthrown, was warned by an oracle to beware of a man wearing one sandal.Many years later, Pelias was holding the Olympics in honor of Poseidon when Jason, rushing to Iolcus, lost one of his sandals in a river while helping Hera, in the form of an old woman, cross.When Jason entered Iolcus, he was announced as a man wearing one sandal.