2 Samuel 2:12-16

12Now Abner the son of Ner and the servants of Ish-bosheth the son of Saul went out from Mahanaim to Gibeon.

13Joab [David’s nephew] the son of Zeruiah and the servants of David also went out and met them by the pool of Gibeon. They sat down, with one group on one side of the pool and the other group on the other side of the pool.

14Then Abner said to Joab, “Let the young men now stand and have a contest before us.” And Joab said, “Let them stand.”

15So they stood up and went over by number, twelve for Benjamin and Ish-bosheth the son of Saul, and twelve of the servants of David.

16Each one of them seized his opponent by the head and thrust his sword into his opponents side; so they fell down together. Therefore that place was called Helkath-hazzurim [that is, the Field of Sides], which is in Gibeon.