Yazid bin Abi Habib يزيد بن أبي حبيب · Chapters on Medicine

“On one of the wings of a fly there is a poison and on the other is the cure. If it falls into the food, then dip it into it, for it puts the poison first and holds back the cure.”

“I came to the Prophet (ﷺ) and I was suffering pain that was killing me. The Prophet (ﷺ) 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.”