Sahih Muslim Book 26, Hadith Number 5439.

Chapter : Curing of the patient with the recitation of Mu’awwidhatan (Suras CXIII., CXIV).

‘Aisha reported that when any of the members of the household fell ill Allah’s Messenger (may peace be upon him) used to blow over him by reciting Mu’awwidhatan, and when he suffered from illness of which he died I used to blow over him and rubbed his body with his hand for his hand had greater healing power than my hand.