2 Samuel 13:1, 14, 28-29

Now Absalom, David’s son, had a beautiful sister, whose name was Tamar. And after a time Amnon, David’s son, loved her.

But he would not listen to her, and being stronger than she, he violated her and lay with her.

Then Absalom commanded his servants, “Mark when Amnon’s heart is merry with wine, and when I say to you, ‘Strike Amnon,’ then kill him. Do not fear; have I not commanded you? Be courageous and be valiant.” So the servants of Absalom did to Amnon as Absalom had commanded. Then all the king’s sons arose, and each mounted his mule and fled.