Maliks Muwatta Book 50, Hadith Number 10.
Section : Seeking Refuge and Talismans in Illness.
Yahya related to me from Malik from Ibn Shihab from Urwa ibn az-Zubayr from A’isha that the Messenger of Allah, may Allah bless him and grant him peace, when he had a complaint, would recite the last three suras of Qur’an, over himself and blow. She said, “When his pain was great, I would recite it over him and wipe him with his right hand hoping for its blessing.”