Numbers 16:37-41

“Tell Eleazar, the son of Aaron the priest, that he shall pick up the censers from the midst of the burned area, because they are holy; and you are to scatter the burning coals farther away.

As for the censers of these men who have sinned at the cost of their own lives, have them made into hammered sheets as plating for the altar, since they did present them before the Lord and they are holy; and they shall serve as a sign to the sons of Israel.”

So 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,

as a reminder to the sons of Israel so that no layman, anyone who was not of the descendants of Aaron, would approach to burn incense before the Lord; then he would not become like Korah and his group—just as the Lord had spoken to him through Moses. Murmuring and Plague

But on the next day all the congregation of the sons of Israel grumbled against Moses and Aaron, saying, “You are the ones who have caused the death of the Lord’s people!”