2 Samuel 2:14-17

14And Abner said to Joab, “Let the young men arise and compete before us.” And Joab said, “Let them arise.” 15Then they arose and passed over by number, twelve for Benjamin and Ish-bosheth the son of Saul, and twelve of the servants of David. 16And each caught his opponent by the head and thrust his sword in his opponent’s side, so they fell down together. Therefore that place was called Helkath-hazzurim,
 Helkath-hazzurim means the field of sword-edges
which is at Gibeon.
17And the battle was very fierce that day. And Abner and the men of Israel were beaten before the servants of David.

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