Numbers 16:40

16:40 It was a memorial for the Israelites, that no outsider who is not a descendant of Aaron should approach to burn incense before the Lord, that he might not become like Korah and his company – just as the Lord had spoken by the authority of Moses.

Numbers 27:17

27:17 who will go out before them, and who will come in before them, and who will lead them out, and who will bring them in, so that the community of the Lord may not be like sheep that have no shepherd.”