Matthew Henry on 2 Samuel 13:1-20
We have here a particular account of the abominable wickedness of Amnon in ravishing his sister, a subject not fit to be enlarged upon nor indeed to be mentioned without blushing, that ever any man should be so vile, especially that a son of David should be so. Amnon's character, we have reason to think, was bad in other things; if he had not forsaken God, he would never have been given up to these vile affections. Godly parents have often been afflicted with wicked children; grace does not run in the blood, but corruption does. We do not find that David's children imitated him in his devotion; but his false steps they trod in, and in those did much worse, and repented not. Parents know not…
Read the whole note in the consoleJamieson-Fausset-Brown on 2 Samuel 13:15
Then Amnon hated her exceedingly--It is not unusual for persons instigated by violent and irregular passions to go from one extreme to another. In Amnon's case the sudden revulsion is easily accounted for; the atrocity of his conduct, with all the feelings of shame, remorse, and dread of exposure and punishment, now burst upon his mind, rendering the presence of Tamar intolerably painful to him.
Adam Clarke on 2 Samuel 13:15
Hated her exceedingly - Amnon's conduct to his sister was not only brutal but inexplicable. It would be easy to form conjectures concerning the cause, but we can arrive at no certainty.
John Gill on 2 Samuel 13:16
And she said unto him, there is no cause,.... For such treatment as this:
this evil in sending me away is greater than the other that thou didst unto me; not that this was a greater sin, but it was a greater evil or injury to her, that being done secretly, this openly; being turned out in that open manner, it might look as if she was the aggressor, and had drawn her brother into this sin, or however had consented to it; had it been kept a secret, she would not have been exposed to public shame and disgrace, and she might have been disposed of in marriage to another; it would not have been known to the grief of her father, to the revenge of Absalom, and to the dishonour of religion; besides,…