2 Samuel 2:17-19

17And the battle that day was very severe; and Abner and the men of Israel were routed before the servants of David.

18And there were three sons of Zeruiah there, Joab, and Abishai, and Asahel. Now Asahel was swift of foot, as one of the gazelles that are in the field.

19And Asahel pursued after Abner; and in going he turned not to the right hand nor to the left from behind Abner.