In Oedipus the King, Teiresias predicts that the murderer of Laius will father his own siblings and marry his own mother.  Oedipus commits himself to finding the man who has murdered Laius, the king of Thebes only to hear from Teiresias that he himself is the actual murderer of the king.  Oedipus does not believe Teiresias and is outraged that he has been accused of such a terrible crime; likewise, Teiresias is angry that Oedipus tries to discredit him and his predictions.