8 The Lord gave these further instructions to Aaron: "I myself have put you in charge of all the holy offerings that are brought to me by the people of Israel. I have given all these consecrated offerings to you and your sons as your permanent share. 9 You are allotted the portion of the most holy offerings that is not burned on the fire. This portion of all the most holy offerings-including the grain offerings, sin offerings, and guilt offerings-will be most holy, and it belongs to you and your sons. 10 You must eat it as a most holy offering. All the males may eat of it, and you must treat it as most holy. 11 "All the sacred offerings and special offerings presented to me when the Israelites lift them up before the altar also belong to you. I have given them to you and to your sons and daughters as your permanent share. Any member of your family who is ceremonially clean may eat of these offerings. 12 "I also give you the harvest gifts brought by the people as offerings to the Lord -the best of the olive oil, new wine, and grain. 13 All the first crops of their land that the people present to the Lord belong to you. Any member of your family who is ceremonially clean may eat this food. 14 "Everything in Israel that is specially set apart for the Lord also belongs to you. 15 "The firstborn of every mother, whether human or animal, that is offered to the Lord will be yours. But you must always redeem your firstborn sons and the firstborn of ceremonially unclean animals.
Matthew Henry's Commentary on Numbers 18:8-15
Commentary on Numbers 18:8-19
(Read Numbers 18:8-19)
All believers are spiritual priests, and God has promised to take care of them. Godliness has the promise of the life that now is. And from the provision here made for the priests, the apostle shows that it is the duty of christian churches to maintain their ministers. Scandalous maintenance makes scandalous ministers. The priests were to be wholly devoted to their ministry, not diverted from it, or disturbed in it, by worldly care or business. Also, that they might be examples of living by faith, not only in God's providence, but in his ordinances. The best should be offered for the first-fruits unto the Lord. Those who think to save, by putting God off with the refuse, deceive themselves, for God is not mocked.