When Joab and his men arrived, he was told that Abner had come to King David and had been sent away with a guarantee of safety.
Later on Joab and David's other officials returned from a raid, bringing a large amount of loot with them. Abner, however, was no longer there at Hebron with David, because David had sent him away with a guarantee of safety.
So Joab went to the king and said to him, “What have you done? Abner came to you—why did you let him go like that?
It is not right to make an innocent person pay a fine; justice is perverted when good people are punished.
His wife was Ahinoam, the daughter of Ahimaaz; his army commander was his cousin Abner, the son of his uncle Ner.