Commentary for Jeremiah 23:29

Is not My word so like fire? They should not have erred to compare their dreams to say that they are prophecy, for the prophetic word, when it comes to a prophet, it comes into him with force like a burning fire, as the matter is stated (supra 20:9): “And it was in my heart like a burning fire,” and (Ezekiel 3:14): “And the hand of the Lord became strong upon me.”

and as a hammer (pic in French), a pick. And some say (marteau in French), a hammer.