Let it rest on the head - All these verbs may be rendered in the future tense: it will rest on the head of Joab, etc. This was a prophetic declaration, which sufficiently showed the displeasure of God against this execrable man.
The curse of David proves that Joab was not justified as blood-revenger or Goel 2 Samuel 3:27 in taking away Abner‘s life.
That leaneth on a staff - Rather, a crutch. The phrase denotes one lame or infirm. For similar instances of hereditary disease and poverty as a punishment of great sin, see 1 Samuel 2:31-33, 1 Samuel 2:36; 2 Kings 5:27; John 9:2.
Mahanaim, on the farther side of Jordan, was chosen as the royal residence, since it offered the greatest security against attack, either from David or from the Philistines. Here the coronation of Ishbosheth took place. His reign was first accepted by the tribes east of Jordan, and was finally extended over all Israel except Judah. For two years the son of Saul enjoyed his honors in his secluded capital. But Abner, intent upon extending his power over all Israel, prepared for aggressive warfare. And “there was long war between the house of Saul and the house of David: but David waxed stronger and stronger, and the house of Saul waxed weaker and weaker.” PP 699.1
At last treachery overthrew the throne that malice and ambition had established. Abner, becoming incensed against the weak and incompetent Ishbosheth, deserted to David, with the offer to bring over to him all the tribes of Israel. His proposals were accepted by the king, and he was dismissed with honor to accomplish his purpose. But the favorable reception of so valiant and famed a warrior excited the jealousy of Joab, the commander-in-chief of David's army. There was a blood feud between Abner and Joab, the former having slain Asahel, Joab's brother, during the war between Israel and Judah. Now Joab, seeing an opportunity to avenge his brother's death and rid himself of a prospective rival, basely took occasion to waylay and murder Abner. PP 699.2
David, upon hearing of this treacherous assault, exclaimed, “I and my kingdom are guiltless before the Lord forever from the blood of Abner the son of Ner. Let it rest on the head of Joab; and on all his father's house.” In view of the unsettled state of the kingdom, and the power and position of the murderers—for Joab's brother Abishai had been united with him—David could not visit the crime with just retribution, yet he publicly manifested his abhorrence of the bloody deed. The burial of Abner was attended with public honors. The army, with Joab at their head, were required to take part in the services of mourning, with rent garments and clothed in sackcloth. The king manifested his grief by keeping a fast upon the day of burial; he followed the bier as chief mourner; and at the grave he pronounced an elegy which was a cutting rebuke of the murderers. “The king lamented over Abner, and said: PP 699.3Read in context »