2 Samuel 3
26 Ref When Joab was come out from David, he sent messengers after Abner, and they brought him back from the well of Sirah: but David didn't know it.
27 Ref When Abner was returned to Hebron, Joab took him aside into the midst of the gate to speak with him quietly, and struck him there in the body, so that he died, for the blood of Asahel his brother.