Sunan Ibn Majah, Chapter: The Chapters on Medicine

"I came to the Prophet (saw) and I was suffering pain that was killing me. The Prophet (saw) said to me: 'Put your right hand on it and say: Bismillah, a'udhu bi'izzatil-lahi wa qudratihi min sharri ma ajidu wa uhadhiru. (In the Name of Allah, I seek refuge in the might and power of Allah from the evil of what I feel and what I fear)," seven times.' I said that, and Allah healed me."