Abner was furious over Ish-bosheth’s accusation. “Am I the head of a dog that belongs to Judah?” he asked. “All this time I have been loyal to the house of your father Saul, to his brothers, and to his friends. I have not delivered you into the hand of David, but now you accuse me of wrongdoing with this woman!
Here, I. Abner breaks with Ish-bosheth, and deserts his interest, upon a little provocation which Ish-bosheth unadvisedly gave him. God can serve his own purposes by the sins and follies of men. 1. Ish-bosheth accused Abner of no less a crime than debauching one of his father's concubines, Sa2 3:7.
Commenting on 2 Samuel 3:7-21
Then was Abner very wroth for the words of Ishbosheth,.... If false he had a good deal of reason for it; and if true, he thought he deserved better at his hands, than to be reproved for and upbraided with what he might think was a very small fault, and might easily be connived at, and especially in one that had been so serviceable to...
Then was Abner very wroth for the words of Ishbosheth, and said, [Am] I a dog's head, which against Judah do shew kindness this day unto the house of Saul thy father, to his brethren, and to his friends, and have not delivered thee into the hand of David, that thou chargest me to day with a fault concerning this woman?