Numbers 16:35

16:35 Then a fire went out from the Lord and devoured the 250 men who offered incense.

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.