Jeremiah 15:19-21

19Therefore thus saith the LORD, If thou shalt return, then will I bring thee again, and thou shalt stand before me: and if thou shalt separate the precious from the vile, thou shalt be as my mouth: let them return to thee; but return not thou to them. 20And I will make thee to this people a fortified brasen wall: and they shall fight against thee, but they shall not prevail against thee: for I am with thee to save thee and to deliver thee, saith the LORD. 21And I will deliver thee from the hand of the wicked, and I will redeem thee from the hand of the terrible.