2 Samuel 2:24-28

24but Joab and Abishai pursued Abner. By sunset, they had gone as far as the hill of Ammah, which is opposite Giah on the way to the wilderness of Gibeon.

25The Benjaminites rallied to Abner; they formed a unit and took their stand on top of a hill.

26Then Abner called out to Joab, “Must the sword devour forever? Don’t you realize this will only end in bitterness? How long before you tell the troops to stop pursuing their brothers?”

27“As God lives,” Joab replied, “if you had not spoken up, the troops wouldn’t have stopped pursuing their brothers until morning.”

28Then Joab blew the ram’s horn, and all the troops stopped; they no longer pursued Israel or continued to fight.