by which he had already twice deserved death, namely, his killing the two generals. Abner (2Sa 3:27) and Amasa the son of Jether (2Sa 20:10). The name יתר is written יתרא in 2Sa 17:25. Joab had murdered both of them out of jealousy in a treacherous and malicious manner; and thereby he had not only grievously displeased David and bidden defiance to his royal authority, but by the murder of Abner had exposed the king to the suspicion in the eyes of the people of having instigated the crime (see at 2Sa 3:28, 2Sa 3:37). דּמי מ ויּשׂם “and he made war-blood in peace,” i.e., he shed in the time of peace blood that ought only to flow in war (שׂים in the sense of making, as in Deu 14:1; Exo 10:2, etc.), “and brought war-blood upon his girdle which was about his loins, and upon his shoes under his feet,” sc. in the time of peace. This was the crime therefore: that Joab had murdered the two generals in a time of peace, as one ought only to slay his opponent in time of war. Girdle and shoes, the principal features in oriental attire when a man is preparing himself for any business, were covered with blood, since Joab, while saluting them, had treacherously stabbed both of them with the sword. David ought to have punished these two crimes; but when Abner was murdered, he felt himself too weak to visit a man like Joab with the punishment he deserved, as he had only just been anointed king, and consequently he did nothing more than invoke divine retribution upon his head (2Sa 3:29). And when Amasa was slain, the rebellions of Absalom and Sheba had crippled the power of David too much, for him to visit the deed with the punishment that was due. But as king of the nation of God, it was not right for him to allow such crimes to pass unpunished: he therefore transferred the punishment, for which he had wanted the requisite power, to his son and successor.
Verse 6
1Ki 2:6 “Do according to thy wisdom (“mark the proper opportunity of punishing him” - Seb. Schmidt), and let not his grey hair go down into hell (the region of the dead) in peace (i.e., punished).” The punishment of so powerful a man as Joab the commander-in-chief was, required great wisdom, to avoid occasioning a rebellion in the army, which was devoted to him.
Verse 7
If the demands of justice required that Joab should be punished, the duty of gratitude was no less holy to the dying king. And Solomon was to show this to the sons of Barzillai the Gileadite, and make them companions of his table; because Barzillai had
