Numbers 16:39-40

And Eleazar the priest took the brazen censers, which they that were burnt had offered; and they beat them out for a covering of the altar, to be a memorial unto the children of Israel, to the end that no stranger, that is not of the seed of Aaron, come near to burn incense before Jehovah; that he be not as Korah, and as his company: as Jehovah spake unto him by Moses.