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.

Then Amnon hated her exceedingly,.... Having gratified his lust, his conscience stung him for it, that he could not bear the sight of the object that had been the instrument of it; and it may be the sharp words she had used, representing him as one of the fools in Israel, and perhaps she used sharper words still after he had abused her, filled him with hatred to her:

so that the hatred wherewith he hated her was greater than the love wherewith he had loved her; a like instance of love being changed into hatred, after the gratification of lust, we have in Honorius towards his sister Placidia (b):

and Amnon said unto her, arise, be gone; without calling her by her name, or owning the relation she bore to him, using her as the basest and vilest of creatures. This conduct was very brutish, as well as imprudent, and foolish to the last degree; had he had any regard to his own reputation, he would never have turned her out of doors so soon, and in such a public manner; but so it was ordered by divine Providence, that his sin might be made known, and so the murder of him for it by Absalom was brought on, and both were suffered as a correction and chastisement to David for his sins of adultery and murder, 2 Samuel 12:11.

(b) Olympiodorus apud Grotium in loc.

Amnon had no sooner gratified his animal passion, than his love to the humbled sister turned into hatred, which was even greater than his (previous) love, so that he commanded her to get up and go. This sudden change, which may be fully explained from a psychological point of view, and is frequently exemplified still in actual life, furnishes a striking proof that lust is not love, but simply the gratification of the animal passions.

Then Amnon hated her exceedingly; so that the hatred wherewith he hated her was greater than the love wherewith he had loved her. And Amnon said unto her, Arise, be gone.

13:15 Hated her - By the just judgment of God both upon Amnon and David, that so the sin might be made publick, and way for the succeeding tragedies.

exceedingly: Heb. with great hatred greatly

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.

13:1-20 From henceforward David was followed with one trouble after another. Adultery and murder were David's sins, the like sins among his children were the beginnings of his punishment: he was too indulgent to his children. Thus David might trace the sins of his children to his own misconduct, which must have made the anguish of the chastisement worse. Let no one ever expect good treatment from those who are capable of attempting their seduction; but it is better to suffer the greatest wrong than to commit the least sin.