To warn Judah of coming destruction by Babylon, call for repentance, and promise a future new covenant where God writes His law on hearts.
Jeremiah 45
1The word that Jeremiah the prophet spake unto Baruch the son of Neriah, when he had written these words in a book at the mouth of Jeremiah, in the fourth year of Jehoiakim the son of Josiah king of Judah, saying,
2Thus saith the LORD, the God of Israel, unto thee, O Baruch;
3Thou didst say, Woe is me now! for the LORD hath added grief to my sorrow; I fainted in my sighing, and I find no rest.
4Thus shalt thou say unto him, The LORD saith thus; Behold, {that} which I have built will I break down, and that which I have planted I will pluck up, even this whole land.
5And seekest thou great things for thyself? seek {them} not: for, behold, I will bring evil upon all flesh, saith the LORD: but thy life will I give unto thee for a prey in all places whither thou goest.