2 Samuel 13:28-29

28Absalom then told his servants, ‘When Amnon has drunk a lot of wine I will tell you, “Knock him down!” Then you must kill him immediately. Do not be afraid. I am the one who is commanding you to do this. So be strong and brave.’

29So Absalom's men killed Amnon, as Absalom had told them to do. Then all the king's other sons got on their mules. They quickly rode away.