2 Samuel 13:29

26 Then Absalom said, “If not, please let my brother Amnon go with us.” The king said to him, “Why should he go with you?”

27 But Absalom pressed him, and he let Amnon and all the king’s sons go with him.

28 Absalom commanded his servants, saying, “Mark now, when Amnon’s heart is merry with wine; and when I tell you, ‘Strike Amnon,’ then kill him. Don’t be afraid. Haven’t I commanded you? Be courageous, and be valiant!”

29 The servants of Absalom did to Amnon as Absalom had commanded. Then all the king’s sons arose, and every man got up on his mule and fled.

30 While they were on the way, the news came to David, saying, “Absalom has slain all the king’s sons, and there is not one of them left!”

31 Then the king arose, and tore his garments, and lay on the earth; and all his servants stood by with their clothes torn.

32 Jonadab the son of Shimeah, David’s brother, answered, “Don’t let my lord suppose that they have killed all the young men, the king’s sons, for Amnon only is dead; for by the appointment of Absalom this has been determined from the day that he forced his sister Tamar.