John Gill Commentary Jeremiah 28:2

"Thus speaketh Jehovah of hosts, the God of Israel, saying, I have broken the yoke of the king of Babylon." — Jeremiah 28:2 (ASV)

Thus speaks the Lord of hosts, the God of Israel Using the language of the true prophets, and describing the Lord just in the same manner they do, when coming from him, and speaking in his name: a bold and daring action, when he knew the Lord had not sent him, nor had said any such thing to him: he next relates with all assurance, saying, I have broken the yoke of the king of Babylon; which he had put upon the neck of the king of Judah; signifying that he should be no more subject to him; that is, he had determined to do it, and would do it, in a very short time.