Matthew Henry on 2 Samuel 13:21-29
What Solomon says of the beginning of strife is as true of the beginning of all sin, it is as the letting forth of water; when once the flood-gates are plucked up, an inundation follows; one mischief begets another, and it is hard to say what shall be in the end thereof.
I. We are here told how David resented the tidings of Amnon's sin: He was very wroth, Sa2 13:21. So he had reason to be, that his own son should do such a wicked thing and draw him to be accessory to it. It would be a reproach to him for not giving him a better education; it would be a blot upon his family, the ruin of his daughter, a bad example to his kingdom, and a wrong to his son's soul. But was it enough for him to be…
Read the whole note in the consoleJamieson-Fausset-Brown on 2 Samuel 13:20
So Tamar remained desolate in her brother Absalom's house--He was her natural protector, and the children of polygamists lived by themselves, as if they constituted different families.
Adam Clarke on 2 Samuel 13:21
But when King David heard - To this verse the Septuagint add the following words: Και ουκ ελυπησε το πνευμα Αμνων του υἱου αυτου, ὁτι ηγαπα αυτον, ὁτι πρωτοτοκος αυτου ην; "But he would not grieve the soul of Amnon his son, for he loved him, because he was his first-born." The same addition is found in the Vulgate and in Josephus, and it is possible that this once made a part of the Hebrew text.
John Gill on 2 Samuel 13:21
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 un…