6, 7. Take the Levites . . . and cleanse them—This passage describes the consecration of the Levites. Although the tribe was to be devoted to the divine service, their hereditary descent alone was not a sufficient qualification for entering on the duties of the sacred office. They were to be set apart by a special ceremony, which, however, was much simpler than that appointed for the priests; neither washing nor anointing, nor investiture with official robes, was necessary. Their purification consisted, along with the offering of the requisite sacrifices (Le 1:4; 3:2; 4:4), in being sprinkled by water mixed with the ashes of a red heifer (Nu 19:9), and shaved all over, and their clothes washed—a combination of symbolical acts which was intended to remind them of the mortification of carnal and worldly desires, and the maintenance of that purity in heart and life which became the servants of God.

     9, 10. thou shalt gather the whole assembly of the children of Israel together, &c.—As it was plainly impossible that the whole multitude of the Israelites could do this, a select portion of them must be meant. This party, who laid their hands upon the Levites, are supposed by some to have been the first-born, who by that act, transferred their peculiar privilege of acting as God's ministers to the Levitical tribe; and by others, to have been the princes, who thus blessed them. It appears, from this passage, that the imposition of hands was a ceremony used in consecrating persons to holy offices in the ancient, as, from the example of our Lord and His apostles, it has been perpetuated in the Christian Church.

     11-13. And Aaron shall offer the Levites—Hebrew, "as a wave offering"; and it has been thought probable that the high priest, in bringing the Levites one by one to the altar, directed them to make some simple movements of their persons, analogous to what was done at the presentation of the wave offerings before the Lord. Thus were they first devoted as an offering to God, and by Him surrendered to the priests to be employed in His service. The consecration ceremonial was repeated in the case of every Levite who was taken (as was done at a later period) to assist the priests in the tabernacle and temple. (See on 2Ch 29:34).

     14. and the Levites shall be mine—that is, exempt from all military duty or secular work—free from all pecuniary imposition and wholly devoted to the custody and service of the sanctuary.

     15. after that, shall the Levites go in to do the service of the tabernacle of the congregation—into the court, to assist the priests; and at removal into the tabernacle—that is, into the door of it—to receive the covered furniture.

     19. to make an atonement for the children of Israel, &c.—to aid the priests in that expiatory work; or, as the words may be rendered, "to make redemption for" the Levites being exchanged or substituted for the first-born for this important end, that there might be a sanctified body of men appointed to guard the sanctuary, and the people not allowed to approach or presumptuously meddle with holy things, which would expose them to the angry judgments of Heaven.