Ezekiel 22:20
20 As one gathers silver and bronze and iron and lead and tin into a furnace, jto blow the fire on it in order to melt it, so I will gather you kin my anger and in my wrath, and I will put you in and melt you.
Malachi 3:3
3 He will sit nas a refiner and purifier of silver, and he will purify the sons of Levi and refine them like gold and silver, and they will bring oofferings in righteousness to the Lord.1