Chapter 29: Medicine (Kitab Al-Tibb)
Narrated A' ishah: the wife of Prophet (ﷺ) said: When the Messenger of Allah (ﷺ) suffered from some pain, he recited mu' awwadhat in his heart and blew (them over him). When the pain became severe, I recited (them) over him and wiped him with his hand in the hope of its blessing.
Sunan Abi Dawud 3902