2 Samuel 2:18

2:18 The three sons of Zeruiah were there – Joab, Abishai, and Asahel. (Now Asahel was as quick on his feet as one of the gazelles in the field.)

2 Samuel 3:30

3:30 So Joab and his brother Abishai killed Abner, because he had killed their brother Asahel in Gibeon during the battle.