Matthew Poole and continuators on Jeremiah 29:27

27 Now therefore, why hast thou not reproved Jeremiah of Anathoth, which maketh himself a prophet to you .

He means it of an active real reproof, as appears by what went before, he would have had Ieremiah imprisoned, or put to that punishment which they called the stocks, the nature of which we cannot determine, concluding him to be but a mad man, and one who was not made a Prophet by any immediate mission from God, but had only made himself a Prophet.