The Levites being granted to Aaron to minister to him, they are here delivered to him by tale, that he might know what he had, and employ them accordingly. Observe, I. By what rule they were numbered: Every male from a month old and upward , Num. 3:15. The rest of the tribes were numbered only from twenty years old and upwards, and of them those only that were able to go forth to war ; but into th...