Jeremiah 15:19 in the King James Version
Therefore thus saith the LORD, If thou return, then will I bring thee again, and thou shalt stand before me: and if thou take forth the precious from the vile, thou shalt be as my mouth: let them return unto thee; but return not thou unto them.
Context
18 Why is my pain perpetual, and my wound incurable, which refuses to be healed? Will you indeed be to me as a deceitful brook, like waters that fail?
19 Therefore the LORD says, “If you return, then I will bring you again, that you may stand before me; and if you take out the precious from the vile, you will be as my mouth. They will return to you, but you will not return to them.
20 I will make you to this people a fortified bronze wall. They will fight against you, but they will not prevail against you; for I am with you to save you and to deliver you,” says the LORD.