John Gill Reformed Baptist @doctorgill

Asahel the brother of Joab was one of the thirty,.... Or rather over the thirty (n), who are next mentioned; since there are thirty reckoned besides him, and the Arabic version calls him the prince of the thirty; Joab is not named at all, because he was general of the whole army, and so not to be reckoned in any of the three classes: Elhanan...

Adam Clarke Methodist @methodicalclarke

Asahel - was one of the thirty - Asahel was one of those officers, or troops, called the shalishim. This Asahel, brother of Joab, was the same that was killed by Abner, Sa2 2:23.

Keil & Delitzsch Lutheran @keilanddelitzsch

2Sa 23:8-39 The following list of David’s heroes we also find in 1 Chron 11:10-47, and expanded at the end by sixteen names (1Ch 11:41-47), and attached in 1Ch 11:10 to the account of the conquest of the fortress of Zion by the introduction of a special heading.

Commenting on 2 Samuel 23:8-39