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 verbally accuses him of complicity in Laius' murder. Outraged, Tiresias tells the king that Oedipus himself is the murderer ("You yourself are the criminal you seek"). Oedipus cannot see how this could be, and concludes that the prophet must have been paid off by Creon in an attempt to undermine him. The two argue vehemently, as Oedipus mocks Tiresias' lack of sight, and Tiresias in turn tells Oedipus that he himself is blind. Eventually Tiresias leaves, muttering darkly that when the murderer is discovered he shall be a native citizen of Thebes, brother and father to his own children, and