Jeremiah 6:28-30 Revised Standard Version Catholic Edition (RSVCE)
28 They are all stubbornly rebellious,
going about with slanders;
they are bronze and iron,
all of them act corruptly.
29 The bellows blow fiercely,
the lead is consumed by the fire;
in vain the refining goes on,
for the wicked are not removed.
30 Refuse silver they are called,
for the Lord has rejected them.”