The oracle told Acrisius that his daughter Danas would have a son, who would kill him. […] This oracle was in Lybia, nine days journey from Alexandria. […] Cepheus entreated the oracle to instruct him what he should do to satisfy the angry Neptune. […] Perseus thus unwittingly accomplished the oracle, which was uttered before he came into the world. […] They instituted an oracle there, and the priestess was called the Pythia.