2 Samuel 2:19

17The battle was very severe that day; and Abner was beaten, and the men of Israel, before David’s servants.

18The three sons of Zeruiah were there: Joab, Abishai, and Asahel. Asahel was as light of foot as a wild gazelle.

19Asahel pursued Abner. He didn’t turn to the right hand or to the left from following Abner.

20Then Abner looked behind him and said, “Is that you, Asahel?” He answered, “It is.”

21Abner said to him, “Turn away to your right hand or to your left, and grab one of the young men, and take his armor.” But Asahel would not turn away from following him.