2 Samuel 2:14-17

Then Abner suggested to Joab, “Let’s have a few of our warriors fight hand to hand here in front of us.” “All right,” Joab agreed. So twelve men were chosen to fight from each side—twelve men of Benjamin representing Ishbosheth son of Saul, and twelve representing David. Each one grabbed his opponent by the hair and thrust his sword into the other’s side so that all of them died. So this place at Gibeon has been known ever since as the Field of Swords. A fierce battle followed that day, and Abner and the men of Israel were defeated by the forces of David.