2nd Samuel 3:9 So do God to Abner, and more also, except, as the Lord hath sworn to David, even so I do to him; 10 To translate the kingdom from the house of Saul, and to set up the throne of David over Israel and over Judah, from Dan even to Beersheba. 11 And he could not answer Abner a word again, because he feared him.
[Patriarchs & Prophets pp 699>700] 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. 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.
2nd Samuel 3:31 And David said to Joab, and to all the people that were with him, Rend your clothes, and gird you with sackcloth, and mourn before Abner. And king David himself followed the bier.
May God add His blessing to the study of His word. “Good night” and God bless!