26As soon as Joab had left David, he sent messengers after Abner, who brought him back from the well of Sirah; but David was unaware of it.
27When Abner returned to Hebron, Joab pulled him aside into the gateway, as if to speak to him privately, and there Joab stabbed him in the stomach. So Abner died on account of the blood of Joab’s brother Asahel.
— 2 Samuel 3:26-27