After receiving the news from Creon that the plague will continue to ravage Thebes until the murderer of Laius is driven from the city, Oedipus petitions the blind prophet Tiresias to identify the killer. Initially, Tiresias is reluctant to tell Oedipus the information he knows regarding Laius's murderer, and Oedipus proceeds to criticize and disrespect him. Tiresias eventually capitulates and informs Oedipus that he is Laius's murderer.
Oedipus is incensed by Tiresias's response and accuses the blind prophet of colluding with Creon to overthrow him. Tiresias then taunts Oedipus by saying that he doesn't even know who his parents are before he begins to speak in riddles. Tiresias then tells Oedipus that the murderer of Laius will turn out to be both brother and father to his children, both son and husband to his mother. He also predicts that the murderer of Laius will become blind and poor as he leaves Thebes and travels to a foreign land.