Jeremiah 6:28-30 NIV

28 They are all hardened rebels,1 going about to slander.2 They are bronze and iron;3 they all act corruptly.

References for Jeremiah 6:28

29 The bellows blow fiercely to burn away the lead with fire, but the refining4 goes on in vain; the wicked are not purged out.

References for Jeremiah 6:29

30 They are called rejected silver,5 because the LORD has rejected them."6

References for Jeremiah 6:30