Asahel the brother of Joab - This verse proves that the division and arrangement mentioned above were made before David was acknowledged king in Hebron; for Asahel, the brother of Joab, who was fourth captain, was slain by Abner, while Ishbosheth reigned over Israel at Mahanaim, 2 Samuel 2:19-23.
Asahel died before the courses, as here described, could have been instituted. Perhaps the arrangements of David in his later years were based upon institutions belonging to the period of his reign at Hebron.