Numbers 16:39-40

39So the priest Eleazar took the bronze censers which the men who were burned had offered, and they hammered them out as plating for the altar, 40as a reminder to the sons of Israel so that 1no 2layman, anyone who was not of the 3descendants of Aaron, would approach 4to burn incense before the Lord; then he would not become like Korah and his group--just as the Lord had spoken to him 5through Moses.