Easton's Bible Dictionary
Being rebuked by Ish-bosheth for the impropriety of taking to wife Rizpah, who had been a concubine of King Saul, he found an excuse for going over to the side of David, whom he now professed to regard as anointed by the Lord to reign over all Israel. David received him favourably, and promised that he would have command of the armies. At this time Joab was absent from Hebron, but on his return he found what had happened. Abner had just left the city; but Joab by a stratagem recalled him, and meeting him at the gate of the city on his return, thrust him through with his sword (2Samuel 3:27,31-39; 4:12. Compare 1Kings 2:5,32). David lamented in pathetic words the death of Abner, "Know ye not that there is a prince and a great man fallen this day in Israel?" (2Samuel 3:33-38.)
These dictionary topics are from M.G. Easton M.A., D.D., Illustrated Bible Dictionary, Third Edition, published by Thomas Nelson, 1897. Public Domain.
Easton, Matthew George. Entry for 'Abner'. Easton's Bible Dictionary. https://www.studylight.org/dictionaries/eng/ebd/a/abner.html. 1897.