2 Samuel 2:25-28

The sons of Benjamin gathered together behind Abner and became one band, and they stood on the top of a certain hill. Then Abner called to Joab and said, “Shall the sword devour forever? Do you not know that it will be bitter in the end? How long will you refrain from telling the people to turn back from following their brothers?” Joab said, “As God lives, if you had not spoken, surely then the people would have gone away in the morning, each from following his brother.” So Joab blew the trumpet; and all the people halted and pursued Israel no longer, nor did they continue to fight anymore.