Adam Clarke on 2 Samuel 2:18

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. It has a qualification also among the Roman soldiers; they were taught both to run swiftly, and to swim well.