2 Samuel 2:14-16

14Then Abner said to Joab, “Let the young men now arise and compete before us.” And Joab said, “Let them arise.”

15So they arose and went over by number, twelve from Benjamin, followers of Ishbosheth the son of Saul, and twelve from the servants of David.

16And each one grasped his opponent by the head and thrust his sword in his opponent’s side; so they fell down together. Therefore that place was called the Field of Sharp Swords, which is in Gibeon.