Num Numbers, chapter Book of Numbers, chapter 17
Speak unto El'azar ben Aharon HaKohen that he take up the fire pans out of the burning, and scatter thou the eish yonder; for they are set apart as kodesh. The fire pans of these chatta'im against their own nefashot, let them make them hammered-out sheets for a covering of the Mizbe'ach: for they offered them before Hashem, therefore they became kadosh; and they shall be an ot unto the Bnei Yisroel.