Plays of Sophocles: Oedipus the King; Oedipus at Colonus; Antigone

"To Laius, King of Thebes, an oracle foretold that the child born to him by his queen Jocasta would slay his father and wed his mother. So when in time a son was born the infant's feet were riveted together and he was left to die on Mount Cithaeron. But a shepherd found the babe and tended him, and delivered him to another shepherd who took him to his master, the King of Corinth. Polybus being childless adopted the boy, who grew up believing that he was indeed the King's son. Afterwards doubting his parentage he inquired of the Delphic god and heard himself the word declared before to Laius." -Preface