Wesley's Notes on the Bible
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,
Thus saith the LORD, the God of Israel, unto thee, O Baruch;
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.
45:3 I find no rest - Upon Baruch's reading the prophecies both he and Jeremiah were advised to hide themselves. This probably disturbed Baruch, and made him lament his condition.
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.
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.
45:5 Seek them not - Dost thou expect what none is like to meet with who feareth God? Upon all flesh - I am bringing calamities upon the whole nation.