40 [To be] a memorial to the children of Israel, that no stranger, who [is] not of the seed of Aaron, should come near to offer incense before the LORD; that he may not be as Korah, and as his company: as the LORD said to him by the hand of Moses.
40
as the LORD directed him through Moses. This was to remind the Israelites that no one except a descendant of Aaron should come to burn incense before the LORD, or he would become like Korah and his followers.