Ezekiel 22:18; Ezekiel 22:20

18 "Son of man, the house of Israel has become dross to me; all of them are bronze and tin and iron and lead in the furnace; they are dross of silver.

20 As one gathers silver and bronze and iron and lead and tin into a furnace, to blow the fire on it in order to melt it, so I will gather you in my anger and in my wrath, and I will put you in and melt you.