1 The 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, 2 Thus saith the LORD, the God of Israel, unto thee, O Baruch; 3 Thou 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. 4 Thus 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. 5 And 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.
[AD 458] Theodoret of Cyrus on Jeremiah 45:2
Joining this history interwoven with the prophecy, in this way he reminds them of the earlier warning that he was commanded to say to Baruch in the days of Jehoiakim.

[AD 458] Theodoret of Cyrus on Jeremiah 45:2
The Lord comforts Baruch, who was serving the prophet, writing the oracles, complaining about the hardships and feeling vexed. He commands him to bear nobly his life full of pain. He says, “If I am now uprooting, cutting off and handing over to all sorts of punishments all the people whom I led out of Egypt and planted in this land, are you distraught because you alone are not spending your life in tranquility? But you should not do this. I will still take care of you, and, when I bring punishment on them, I will bring you comfort. And wherever you live, you will have my care.”