הֲל֨וֹא כֹ֧ה דְבָרִ֛י כָּאֵ֖שׁ נְאֻם־יְהוָ֑ה וּכְפַטִּ֖ישׁ יְפֹ֥צֵֽץ סָֽלַע׃ (ס)
나 여호와가 말하노라 내 말이 불같지 아니하냐 반석을 쳐서 부스러뜨리는 방망이 같지 아니하냐
Rashi on Jeremiah
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.”
Rashi on Jeremiah
and as a hammer (pic in French), a pick. And some say (marteau in French), a hammer.