 Jason grew in the care of Chiron the centaur, on the slopes of Mount Pelion, to be educated while Pelias, fearing that he would be overthrown, was warned by an oracle to beware a man wearing one sandal.Many years later, Pelias offered a sacrifice by the sea in honor of Poseidon.Jason, who was summoned with many others to take part in the sacrifice, lost one of his sandals in the flooded river Anaurus while rushing to Iolcus.