Numbers 16:40

40 a memorial to the sons of Israel, so that a stranger who is not of the seed of Aaron doth not draw near to make a perfume before Jehovah, and is not as Korah, and as his company, -- as Jehovah hath spoken by the hand of Moses to him.

Numbers 16:40 Meaning and Commentary

Numbers 16:40

[To be] a memorial unto the children of Israel
The whole body of them; this explains what is meant by sign, ( Numbers 16:38 ) ; that it was to put or keep in mind what follows:

that no stranger which [is] not of the seed of Aaron come near to offer
incense before the Lord;
not only any Gentile but any Israelite, and not any Israelite only, but any Levite; none but those of the family of Aaron might offer incense before the Lord;

that he be not as Korah and as his company;
this makes it clear that Korah perished at this time, though it is nowhere expressed; and it seems pretty plain from hence that he perished by fire, as his company, the two hundred fifty men with censers, did:

as the Lord said unto him by the hand of Moses;
either to Korah, who is the immediate antecedent, and who perished as the Lord had told him by Moses he should; so some understand it, mentioned by Aben Ezra and Jarchi; or else to Aaron, as they interpret it; and then the sense is, that none but those of Aaron's seed should offer incense, as the Lord had declared to him by Moses; see ( Numbers 3:10 ) ; or it may be rather to Eleazar, as Abendana, who did as the Lord spake to him by Moses, took up the censers of the men that were burnt, and got them beaten into broad plates, and covered the altar of burnt offering with them.

Numbers 16:40 In-Context

38 [even] the censers of these sinners against their own souls; and they have made them spread-out plates, a covering for the altar, for they have brought them near before Jehovah, and they are hallowed; and they are become a sign to the sons of Israel.'
39 And Eleazar the priest taketh the brazen censers which they who are burnt had brought near, and they spread them out, a covering for the altar --
40 a memorial to the sons of Israel, so that a stranger who is not of the seed of Aaron doth not draw near to make a perfume before Jehovah, and is not as Korah, and as his company, -- as Jehovah hath spoken by the hand of Moses to him.
41 And all the company of the sons of Israel murmur, on the morrow, against Moses and against Aaron, saying, `Ye -- ye have put to death the people of Jehovah.'
42 And it cometh to pass, in the company being assembled against Moses and against Aaron, that they turn towards the tent of meeting, and lo, the cloud hath covered it, and the honour of Jehovah is seen;
Young's Literal Translation is in the public domain.