Numbers 16:35-40

35Fire also came out from Adonai and consumed the 250 men offering the incense.

36Adonai spoke to Moses saying,

37“Tell Eleazar son of Aaron the kohen, to take the censers from the burning, because they are holy, and scatter the coals at a distance.

38As for the censers of these men who sinned at the cost of their lives, let them be taken and hammered into sheets as a covering for the altar. For they were presented before Adonai, so they are holy. They are to be a sign to Bnei-Yisrael.”

39So Eleazar the kohen collected the bronze censers brought by the ones who were burned and hammered them into an overlay for the altar,

40just as Adonai had spoken to him by Moses’ hand, so that it would be as a reminder to Bnei-Yisrael that no one who was not a descendant of Aaron should burn incense before Adonai, and so no one would become like Korah and his following.