And thou shalt set the Levites before Aaron, and before his sons,.... After atonement was made for them, as Aben Ezra observes; then they were presented to Aaron and his sons, to whom they were given to he their ministers, and assistants to them:

and offer them for an offering unto the Lord: or, and "waved them", &c. as before, that is, order them to be waved; for not Moses, but Aaron, did this, and indeed was done already; and therefore should rather be rendered, as by Bishop Patrick, after thou hast offered, or waved them.

And thou shalt set the Levites before Aaron, and before his sons, and offer them for an offering unto the LORD.

8:13 Set the Levites before Aaron - Give the Levites to them, or to their service. Unto the Lord - For to him they were first properly offered, and by him given to the priests in order to his service.

8:5-26 Here we have directions for the solemn ordination of the Levites. All Israel must know that they took not this honour to themselves, but were called of God to it; nor was it enough that they were distinguished from others. All who are employed for God, must be dedicated to him, according to the employment. Christians must be baptized, ministers must be ordained; we must first give ourselves unto the Lord, and then our services. The Levites must be cleansed. They must be clean that bear the vessels of the Lord. Moses must sprinkle the water of purifying upon them. This signifies the application of the blood of Christ to our souls by faith, that we may be fit to serve the living God. God declares his acceptance of them. All who expect to share in the privileges of the tabernacle, must resolve to do the service of the tabernacle. As, on the one hand, none of God's creatures are his necessary servants, he needs not the service of any of them; so none are merely honorary servants, to do nothing. All whom God owns, he employs; angels themselves have their services.