2 Samuel 2:24-28

24So Joab and Abishai chased Abner. At sunset they came to the hill of Ammah near Giah on the way to the wilderness of Gibeon.

25The Benjaminites formed their ranks behind Abner and were like a single army, standing at the top of a certain hill.

26Then Abner called out to Joab, “Must the sword devour forever? Don’t you realize that this will turn bitter in the end? When will you tell the people to turn aside from pursuing their brothers?”

27Joab replied, “As surely as God lives, if you had not said this, it would have been morning before the people would have abandoned pursuit of their brothers!”

28Then Joab blew the ram’s horn and all the people stopped in their tracks. They stopped chasing Israel and ceased fighting.