Jeremiah 6:27-30 King James Version (KJV)
27 I have set thee for a tower and a fortress among my people, that thou mayest know and try their way.
28 They are all grievous revolters, walking with slanders: they are brass and iron; they are all corrupters.
29 The bellows are burned, the lead is consumed of the fire; the founder melteth in vain: for the wicked are not plucked away.
30 Reprobate silver shall men call them, because the Lord hath rejected them.