Oedipus Rex reveals the prophecy which caused him to leave Corinth (791-93): "that I was fated to lie with my mother," "and show to daylight an accursed breed" "which men would not endure, and I was doomed" "to be murderer of the father that begot me." The implication of Laius's oracle is ambiguous. One interpretation considers that the presentation of Laius's oracle in this play differs from that found in Aeschylus's Oedipus trilogy produced in 467 BC. Helaine Smith argues: Sophocles had the option of making the oracle to Laius conditional ("if" Laius has a son, that son will kill him) or
Oedipus Rex mother, and shed/With [his] own hands the blood of [his] own sire"". Desperate to avoid this terrible fate, Oedipus, who still believes that Polybus and Merope are his true parents, leaves Corinth for the city of Thebes. On the road to Thebes, Oedipus encounters Laius and his retainers, and the two quarrel over whose chariot has the right of way. The Theban king moves to strike the insolent youth with his sceptre, but Oedipus, unaware that Laius is his true father, throws the old man down from his chariot, killing him. Thus, Laius is slain by his own son, and