2 Samuel 2:22-26

Then Abner repeated again to Asahel, “Turn aside for your own good from following me. Why should I strike you to the ground? How then could I show my face to your brother Joab?”

However, he refused to turn aside; so Abner struck him in the belly with the butt end of the spear, so that the spear came out at his back. And he fell there and died on the spot. And it happened that all who came thereafter to the place where Asahel had fallen and died, stood still.

But Joab and Abishai pursued Abner, and when the sun was going down, they came to the hill of Ammah, which is opposite Giah by way of the wilderness of Gibeon.

And the sons of Benjamin gathered together behind Abner and became one troop, and they stood on the top of a hill.

Then Abner called to Joab and said, “Should the sword devour forever? Do you not realize that it will be bitter in the end? So how long will you refrain from telling the people to turn back from pursuing their kinsmen?”