(21) He was very wroth.--The LXX. adds, "but he vexed not the spirit of Amnon his son, because he loved him, because he was his firstborn,"--which is doubtless in part the reason of David's guilty leniency. The remembrance of his own sin also tended to withhold his hand from the administration of justice. David's criminal weakness towards his children was the source of much trouble from this time to the end of his life.

Verse 21. - David... was very wroth. The legal punishment for Amnon's crime was "the being cut off in the sight of the people" (Leviticus 20:17). But how could David, who had himself committed crimes for which death was the appointed penalty, carry out the law against his firstborn for following his example? Still, he might have done more than merely give Amnon words of reproof. Eli had done as much, and been punished with the death of his sons for his neglect of duty (1 Samuel 2:34). The sin of David's son had been even more heartless than theirs; and could David hope to escape the like penalty? It would have been wise to have given proof that his repentance included the suppression of the crime to which his previous conduct had given encouragement. But David was a man whose conduct was generally governed by his feelings. He was a creature of warm and often generous impulse, but his character lacked the steadiness of thoughtful and consistent purpose.

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.But when King David heard of all these things,.... Of Amnon's ravishing Tamar, and turning her out of doors in that inhuman manner he did, and of her distress upon it:

he was very wroth; with Amnon; but we read not of any reproof he gave him, nor of any punishment inflicted on him by him. Abarbinel thinks the reason why he was not punished was because his sin was not cognizable by a court of judicature, nor was punishable by any way, or with any kind of death inflicted by the sanhedrim, as stoning, burning, &c. nor even by scourging, because there were no witnesses; but the punishment of it was cutting off, i.e. by the hand of God. The Jews say (e) a law was made on this, that virgins or unmarried persons should not be alone; for if this was done to the daughter of a king, much more might it be done to the daughter of a private man; and if to a modest person, much more to an impudent one.

(e) T. Bab. Sanhedrin, fol. 21. 1.