The Wicked are Compared to Brass and Iron
Source: TTT
Jeremiah 6:28
All are hardened rebels, walking around as slanderers. They are bronze and iron; all of them are corrupt.
Ezekiel 22:18
“Son of man, the house of Israel has become dross to Me. All of them are copper, tin, iron, and lead inside the furnace; they are but the dross of silver.