2-samuel 13:21

Wroth - To be provoked; angered.

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.

The Septuagint adds, what is a good explanation, "but he did not vex the spirit of Amnon his son, because he loved him, because he was his first-born." This want of justice in David's conduct, and favoritism to Amnon, probably rankled in Absalom's heart, and was the first seed of his after rebellion.

13:21 Wroth - With Amnon: whom yet he did not punish, at least so severely as he should either from the consciousness of his own guilt in the like kind; or, from that foolish indulgence which he often shewed to his children.