Joab then left David and sent messengers after Abner to bring him back from the cistern of Sirah; but David did not know.
Don’t you know Abner? He came to trick you, to learn your comings and goings, to learn everything you do.”
When Abner returned to Hebron, Joab took him aside within the city gate to speak with him privately. There he stabbed him in the abdomen, and he died for the blood of Asahel, Joab’s brother.