In Sophocles's Antigone, Creon decrees that Polynices is a traitor to Thebes and that his body is to be left unburied on the battlefield. He also states that anyone who attempts to bury Polynices will be put to death. When Antigone violates this edict and buries her brother, Creon, true to his word, sentences her to death. He later comes to regret these choices.
The first time we see Creon regret his decisions is after he meets with Tiresias. The blind prophet tells Creon that his treatment of Polynices's body and imprisonment of Antigone will anger the gods and bring a curse down on Thebes. Initially, Creon dismisses Tiresias's warning, but then he decides to heed it. He buries Polynices's body and plans to free Antigone. Unfortunately, this change of heart occurs too late.
Antigone kills herself. Distraught by the death of his betrothed, Haemon tries to kill his father, but then kills himself instead. Creon regrets his decisions, as they led to the loss of his son. After learning of Haemon's death, Eurydice curses Creon for his stubbornness and foolish pride and then stabs herself and dies.
Creon is cradling Haemon's dead body when he learns that his wife is also dead. Eurydice's body is brought to Creon, and the play concludes with him surrounded by the corpses of his son and wife, lamenting his decisions and praying to the gods for a swift death.