21 When King David heard what had happened, he was very angry. 22 And though Absalom never spoke to Amnon about this, he hated Amnon deeply because of what he had done to his sister.

Matthew Henry's Commentary on 2 Samuel 13:21-22

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.