Jami` at-Tirmidhi 2080

Uthman bin Abi Al-'As narrated:"The Messenger of Allah (S.A.W) came to me while I had a pain that almost ruined me. So,the Messenger of Allah (S.A.W) said: 'Rub it with your right hand seven times and say A`udhu bi `Izzatillah Wa Qudratihi wa Sultanihi min sharri ma ajid." ("I seek refuge in Allah's might, power, an authority, from the evil of what I suffer.)" He said: "So I did it, and Allah removed what I had, and I never ceased telling my family and others to do it