Numbers 16:37-38

³⁷Say to Eleazar, the son of Aaron the priest, that he is to take out of the flames the vessels with the perfumes in them, turning the fire out of them, for they are holy;

³⁸And let the vessels of those men, who with their lives have made payment for their sin, be hammered out into plates as a cover for the altar; for they have been offered before the Lord and are holy; so that they may be a sign to the children of Israel.