2 Samuel 13:22-28

But Absalom did not speak to Amnon either good or bad; for Absalom hated Amnon because he had violated his sister Tamar. Now it came about after two full years that Absalom had sheepshearers at Baal-hazor near Ephraim, and Absalom invited all the king’s sons [to a party]. Absalom came to [his father] the king and said, “Behold, your servant has sheepshearers; please let the king and his servants go with your servant.” But the king said to Absalom, “No, my son, we should not all go, for we will be a burden to you.” Although Absalom [strongly] urged David, still he would not go, but he gave him his blessing. Then Absalom said, “If not, then at least let my brother Amnon go with us.” And the king said to him, “Why should he go with you?” But Absalom urged him [again], and he let Amnon and all the king’s sons go with him. Now Absalom commanded his servants, “Notice carefully, when Amnon’s heart is joyous with wine, and when I say to you, ‘Strike Amnon,’ then kill him. Do not be afraid; have I not commanded you myself [and in doing so have I not taken full responsibility for his death]? Be courageous and brave.”