2 Samuel 2:16 (BSB)

Then each man grabbed his opponent by the head and thrust his sword into his opponent’s side, and they all fell together. So this place, which is in Gibeon, is called Helkath-hazzurim.

From 2 Samuel 2. Also in the ESV.

Commentary on 2 Samuel 2:16

• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on 2 Samuel 2:8-17: Here is, I. A rivalship between two kings - David, whom God made king, and Ishbosheth, whom Abner made king. One would have thought, when Saul was slain, and all his sons that had sense and spirit enough to take the field with him, David would come to the throne without any opposition, since all Israel knew, not only how he had signalized himself, but...
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on 2 Samuel 2:16: And they caught everyone his fellow by the head,.... By the hair of his head with his hand: and thrust his sword in his fellow's side; which he had in the other: so they fell down together; the twelve on each side, all the twenty four; some think only the twelve on Abner's side fell; but to me it seems that they all fell dead...
• Geneva Bible Notes (Reformed), Geneva Bible Study Notes on 2 Samuel 2:16: And they caught every one his fellow by the head, and [thrust] his sword in his fellow's side; so they fell down together: wherefore that place was called Helkathhazzurim, which [is] in Gibeon. (i) Meaning his adversary.
• Adam Clarke (Methodist), Clarke's Commentary on the Bible on 2 Samuel 2:16: Caught every one his fellow by the head - Probably by the beard, if these persons were not too young to have one, or by the hair of the head. Alexander ordered all the Macedonians to shave their beards; and being asked by Parmenio why they should do so, answered, "Dost thou not know that in battle there is no better hold than the beard?"...