2 Samuel 2:12-16

12And Abner the son of Ner, and the servants of Ishbosheth the son of Saul, went out from Mahanaim to Gibeon.

13And Joab the son of Zeruiah, and the servants of David, went out. And they met together by the pool of Gibeon; and they sat down, these on the one side of the pool, and those on the other side of the pool.

14And Abner said to Joab, Let the young men now arise and make sport before us. And Joab said, Let them arise.

15And they arose and went over by number, twelve for Benjamin, and for Ishbosheth the son of Saul, and twelve of the servants of David.

16And they caught every one his fellow by the head, and [thrust] his sword in his fellow's side, and they fell down together. And that place was called Helkath-hazzurim, which is by Gibeon.