Jeremiah 6:29 in the King James Version
The bellows are burned, the lead is consumed of the fire; the founder melteth in vain: for the wicked are not plucked away.
Context
28 They are all grievous rebels, going around to slander. They are bronze and iron. All of them deal corruptly.
29 The bellows blow fiercely. The lead is consumed in the fire. In vain they go on refining, for the wicked are not plucked away.
30 Men will call them rejected silver, because the LORD has rejected them.”