(15) Hated her exceedingly.—“It is characteristic of human nature to hate one whom you have injured” (Tacitus, quoted by Kirkpatrick), This result shows that Amnon was governed, not by love, but by mere animal passion.

2 Samuel 13:15-17. Then Amnon hated her exceedingly — His mind, which at first had been impelled by lust, was now agitated by remorse, which drove it to a different extreme, like the vibration of a pendulum. The horror of his guilt struck him with a sudden detestation of her whom he deemed the cause of it, and he hated his sister when he should have hated himself. Thus, through God’s abandoning him, in just judgment, to the tumult of his own intemperate mind, this other punishment of David’s adultery became more flagrant; and the prophet’s prediction, of evil being raised up to him out of his own house, more conspicuous. For Amnon’s barbarous behaviour now precluded all possibility of concealing his guilt. The moment his brutality was indulged, he commanded his sister out of his sight. And she said, There is no cause — For me to go, or for this hard usage. She had given him no cause for aggravating his first offence, by loading it with an immediate and public scandal, and indelible reproach upon her, himself, and his house; upon religion, and the people of God. This evil is greater than the former — Not a greater sin, but an act of greater cruelty, and a greater calamity to her; because it exposed her to general infamy and contempt. And, besides, it turned a private offence into a matter of public scandal, to the great dishonour of God and of his people, and especially of all the royal family. But he would not hearken to her —

He was now as deaf to decency and humanity as he had been before to all sense of shame and conscience, and, therefore, called to his servant that attended him, and bid him turn out that woman from him, and bolt the door after her.

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.My shame - Better, "my reproach." Compare Genesis 30:23; Genesis 34:14; 1 Samuel 11:2.

Speak unto the king ... - It cannot be inferred with certainty from this that marriages were usual among half brothers and sisters in the time of David. The Levitical law forbade them (marginal reference), and Tamar may have merely wished to temporize. On the other hand, the debasing and unhumanizing institution of the harem, itself contrary to the law of Moses Deuteronomy 17:17, may well have led to other deviations from its precepts, and the precedent of Abraham Genesis 20:12 may have seemed to give some sanction to this particular breach of it.

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. Then Amnon hated her exceedingly; partly because, his lust being now satisfied, his mind and conscience had a true and clear prospect and deep sense of the natural turpitude and baseness of the action, and of that shame, and contempt, and loss, and mischief which was likely to follow it, and consequently an utter aversion from her who had been the instrument and occasion of his sin; and principally by the just judgment of God, both upon Amnon and David, that so the sin might be made public, and way made for the succeeding tragedies; for otherwise it would probably produce love and kindness to her, as it did in another, Genesis 34:2,3; especially, in him, whom both nature, and interest, and even lust itself, obliged to allay her grief and shame by all possible demonstrations of kindness.

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.

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.