Al-Matalib al-'Aliyah 2485 — Ruqyah

It is narrated from Sayyiduna Uthman bin Affan (may Allah be pleased with him) that he said: I fell ill, and the Messenger of Allah (peace and blessings be upon him) used to perform ruqyah over me, seeking Allah's protection for me. So one day he (peace and blessings be upon him) recited protection (ruqyah) over me with these words: 'Bismillahi al-Rahmani al-Rahim, u'idhuka billahi al-ahadi al-samad, alladhi lam yalid wa lam yulad, wa lam yakun lahu kufuwan ahad, min sharri ma tajid' (In the name of Allah, the Most Gracious, the Most Merciful. I place you in the protection of Allah, the One, the Self-Sufficient, who begets not, nor was He begotten, and there is none comparable to Him [Surah al-Ikhlas: 3-4]; (I place you in His protection) from the evil of the illness and pain that you feel (in your body)). Then when the Messenger of Allah (peace and blessings be upon him) stood up straight (after the ruqyah), he said: "O Uthman! Seek Allah's protection with these words, for you will never have sought protection with anything like them."
Imam Abu Ya'la al-Mawsili recorded this hadith in his Musnad. In its chain is Hafs bin Sulayman who, although an imam in the science of Qur'anic recitation, has been declared da'if (weak) in the science of hadith.