It is narrated from Sayyiduna Uthman bin Abi Al-Aas that once I suffered from an ailment which brought me close to death. The Prophet came to visit me and said: Hold with your right hand and say seven times: "A'udhu billahi wa qudratihi min sharri ma ajid." I did so, and Allah removed my ailment. Because of this, I continuously advise my family and others to do the same.