A man said: O Messenger of Allah, I think things in my heart about the Lord; that I should become a lump of charcoal is dearer to me than that I should speak of it. Shu'bah said: One of the two narrators said: "Praise be to Allah, who has given (Satan) no power over you except whispering." And the other said: "Praise be to Allah, who has reduced his matter to whispering."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 10792