21 When King David heard of all these things, he became very angry, but he would not punish his son Amnon, because he loved him, for he was his firstborn. 22 But Absalom spoke to Amnon neither good nor bad; for Absalom hated Amnon, because he had raped his sister Tamar. 23 After two full years Absalom had sheepshearers at Baal-hazor, which is near Ephraim, and Absalom invited all the king's sons. 24 Absalom came to the king, and said, "Your servant has sheepshearers; will the king and his servants please go with your servant?" 25 But the king said to Absalom, "No, my son, let us not all go, or else we will be burdensome to you." He pressed him, but he would not go but gave him his blessing. 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 until he let Amnon and all the king's sons go with him. Absalom made a feast like a king's feast. 28 Then Absalom commanded his servants, "Watch when Amnon's heart is merry with wine, and when I say to you, "Strike Amnon,' then kill him. Do not be afraid; have I not myself commanded you? Be courageous and valiant." 29 So the servants of Absalom did to Amnon as Absalom had commanded. Then all the king's sons rose, and each mounted his mule and fled.
Matthew Henry's Commentary on 2 Samuel 13:21-29
Commentary on 2 Samuel 13:21-29
(Read 2 Samuel 13:21-29)
Observe the aggravations of Absalom's sin: he would have Ammon slain, when least fit to go out of the world. He engaged his servants in the guilt. Those servants are ill-taught who obey wicked masters, against God's commands. Indulged children always prove crosses to godly parents, whose foolish love leads them to neglect their duty to God.