Numbers 16:35-40

35And fire came out from the Lord and consumed the 250 men offering the incense.

36Then the Lord spoke to Moses, saying,

37"Tell Eleazar the son of Aaron the priest to take up the censers out of the blaze. Then scatter the fire far and wide, for they have become holy.

38As for the censers of these men who have sinned at the cost of their lives, let them be made into hammered plates as a covering for the altar, for they offered them before the Lord, and they became holy. Thus they shall be a sign to the people of Israel."

39So Eleazar the priest took the bronze censers, which those who were burned had offered, and they were hammered out as a covering for the altar,

40to be a reminder to the people of Israel, so that no outsider, who is not of the descendants of Aaron, should draw near to burn incense before the Lord, lest he become like Korah and his company—as the Lord said to him through Moses.