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 clear. A man arrives from Corinth with the message that Oedipus's father has died. Oedipus, to the surprise of the messenger, is made ecstatic by this news, for it proves one half of the prophecy false, for now he can never kill his father. However, he still fears that he may somehow commit incest with his mother. The messenger, eager to ease Oedipus's mind, tells him not to worry, because Merope was not in fact his real mother. It emerges that this messenger was formerly a shepherd on Mount Cithaeron, and that he was given a baby, which the childless