And the three sons of Zeruiah were there, Joab, Abishai, and Asahel. Now Asahel was as swift of foot as a wild gazelle.
We have here the contest between Abner and Asahel. Asahel, the brother of Joab and cousin-german to David, was one of the principal commanders of David's forces, and was famous for swiftness in running: he was as light of foot as a wild roe (Sa2 2:18); this he got the name of by swift pursuing, not swift flying.
Commenting on 2 Samuel 2:18-24
And there were three sons of Zeruiah there,.... In the battle: Joab, and Abishai, and Asahel; Joab was the general of the array, Abishai was he who went into Saul's host at night, and took away his spear and cruse of water at his head, Sa1 26:6; and it is for the sake of the third, Asahel, that the account is given, the story of...
Asahel was as light of foot as a wild roe - To be swift of foot was deemed a great accomplishment in the heroes of antiquity; ποδας ωκυς Αχιλλευς, the swift-footed Achilles, is an epithet which Homer gives to that hero no less than thirty times in the course of the Ilias.