Laius

All he must do is find the murderer of Laius, the former king whom he replaced both on the throne and in Queen Jocasta’s bed.

King Laius of Thebes was the third in descent from Cadmus.

Jocasta tries to reassure her husband that oracles don’t always get it right by telling him that one once told Laius that he would die by his son’s end.

Foremost among them is the unfairly maligned passive voice: Laius was killed by Oedipus, as opposed to Oedipus killed Laius.

Understandably, his father, Laius — king of Thebes — wasn’t particularly keen on the idea, so he left baby Oedipus on a mountain to die.