8 Then the Lord said to Aaron, "And behold, I have given you whatever is kept of the offerings made to me, all the consecrated things of the people of Israel; I have given them to you as a portion, and to your sons as a perpetual due. 9 This shall be yours of the most holy things, reserved from the fire; every offering of theirs, every cereal offering of theirs and every sin offering of theirs and every guilt offering of theirs, which they render to me, shall be most holy to you and to your sons. 10 In a most holy place shall you eat of it; every male may eat of it; it is holy to you. 11 This also is yours, the offering of their gift, all the wave offerings of the people of Israel; I have given them to you, and to your sons and daughters with you, as a perpetual due; every one who is clean in your house may eat of it. 12 All the best of the oil, and all the best of the wine and of the grain, the first fruits of what they give to the Lord, I give to you. 13 The first ripe fruits of all that is in their land, which they bring to the Lord, shall be yours; every one who is clean in your house may eat of it. 14 Every devoted thing in Israel shall be yours.
Matthew Henry's Commentary on Numbers 18:8-14
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.