Jeremiah 6:28-30

They are the most stubborn of rebels. Each one spreads slander and practices dishonesty. They are as hard as bronze and iron. Though the bellows blow fiercely, yet the smelter smelts to no avail. Fire melts and burns away the lead, but my refining fire fails to separate the dross of their wickedness. They are called ‘rejected silver,’ for YAHWEH has rejected them.”