And you and your sons with you shall guard your priesthood for all that concerns the altar and that is within the veil; and you shall serve. I give your priesthood as a gift, and any outsider who comes near shall be put to death.”
The coherence of this chapter with that foregoing is very observable. I. The people, in the close of that chapter, had complained of the difficulty and peril that there were in drawing near to God, which put them under some dreadful apprehensions that the tabernacle in the midst of them, which they hoped would have been their joy and glory, would rather be their terror and ruin.
Commenting on Numbers 18:1-7
Therefore thou and thy sons with thee shall keep your priest's office,.... Observe all the duties of it, and keep out others from intruding into it: for everything of the altar: both of incense and of burnt offering with respect to burning incense on the one, and offering sacrifices on the other; both were to be done by priests, and by no other: and within...
Num 18:5-7 The charge of the sanctuary (i.e., the dwelling) and the altar (of burnt-offering) devolved upon Aaron and his sons, that the wrath of God might not come again upon the children of Israel (see Num 8:19), - namely, through such illegal acts as Nadab and Abihu (Lev 10:2), and the company of Korah (Num 16:35), had committed.
Commenting on Numbers 18:5-7