Oedipus spells out in more detail exactly what exile will mean: total social exclusion. He then formally curses the unknown murderer and anyone who shelters or protects him, even unwittingly. "Even if he's caught in my own house: may the curse I pronounced on him strike me." [Irony!]
Why is he so anxious to avenge Laius?

• He was his father
• He was like a father to him
• He was Jocasta's husband