Original Verse:
Ezekiel Chapter 22 Verse 18Son of man, the house of Israel is become dross unto me: all of them are brass and tin and iron and lead, in the midst of the furnace; they are the dross of silver.

Reference Verses:
Jeremiah Chapter 6 Verse 28They are all grievous revolters, going about with slanders; they are brass and iron: they all of them deal corruptly.
Proverbs Chapter 25 Verse 4Take away the dross from the silver, And there cometh forth a vessel for the refiner:
Psalms Chapter 119 Verse 119Thou puttest away all the wicked of the earth like dross: Therefore I love thy testimonies.
Jeremiah Chapter 6 Verse 29-30 [29] The bellows blow fiercely; the lead is consumed of the fire: in vain do they go on refining; for the wicked are not plucked away. [30] Refuse silver shall men them, because Jehovah hath rejected them.