2 Samuel 13:28-30

28Then Absalom commanded his young men saying, “Now watch Amnon until his heart is merry with wine. When I tell you, ‘Strike Amnon!’ then put him to death! Have no fear! Isn’t it I who commanded you? Be strong! Be sons of valor!”

29So Absalom’s young men did to Amnon as Absalom had ordered. Then all the king’s sons got up, each mounted his mule and fled.

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