NUMBERS 16:37-38

³⁷Speak unto Eleazar the son of Aaron the priest, that he take up the censers out of the burning, and scatter thou the fire yonder; for they are holy;

³⁸even the censers of these sinners against their own lives, and let them be made beaten plates for a covering of the altar: for they offered them before the LORD, therefore they are holy: and they shall be a sign unto the children of Israel.