Ezekiel 22:18-20
22:18 “Son of man, the house of Israel has become slag to me. All of them are like bronze, tin, iron, and lead in the furnace; they are the worthless slag of silver.
22:19 Therefore this is what the sovereign Lord says: ‘Because all of you have become slag, look out! – I am about to gather you in the middle of Jerusalem.
22:20 As silver, bronze, iron, lead, and tin are gathered in a furnace so that the fire can melt them, so I will gather you in my anger and in my rage. I will deposit you there and melt you.