Jeremiah 6:28

26Daughter of my people, clothe yourself with sackcloth, and wallow in ashes! Mourn, as for an only son, most bitter lamentation, for the destroyer will suddenly come on us.

27“I have made you a tester of metals and a fortress among my people, that you may know and try their way.

28They are all grievous rebels, going around to slander. They are bronze and iron. All of them deal corruptly.

29The bellows blow fiercely. The lead is consumed in the fire. In vain they go on refining, for the wicked are not plucked away.

30Men will call them rejected silver, because the LORD has rejected them.”