2 Samuel 2:16-20

And each one of them seized 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, which is in Gibeon.

That day the battle was very severe, and Abner and the men of Israel were defeated by the servants of David.

Now the three sons of Zeruiah were there, Joab, Abishai, and Asahel; and Asahel was as swift-footed as one of the gazelles that is in the field.

Asahel pursued Abner and did not turn to the right or to the left from following Abner.

Then Abner looked behind himself and said, “Is that you, Asahel?” And he said, “It is I!”