Grievous revolters; obstinate and refractory, Isaiah 31:6 Jeremiah 5:3,23. Walking with slanders; being their main business to detract from thee and the other prophets, Jeremiah 18:18, Jeremiah 20:10; a sin expressly forbidden, Leviticus 19:16. They are brass and iron: this to the end of the chapter is all metaphorical; either they are impudent, as brass doth sometimes signify, or they are obstinate and inflexible, as iron notes: see both Isaiah 48:4: or it signifies their corrupt estate; they are not pure metal, as silver or gold, but base and mean, as brass and iron mixed together, Ezekiel 22:18. They are all corrupters: this relates to their manners; they propagate their corruption, Isaiah 1:4; they strengthen one another in wickedness.
Related Commentaries of Jeremiah 6:28
Jeremiah 6:28
28 They are all grievous revolters, walking with slanders: they are brass and iron; they are all corrupters.