It is narrated from Sayyiduna Fadala bin Ubaid Ansari (may Allah be pleased with him), he says: The Noble Prophet (peace and blessings be upon him) taught me a supplication (ruqyah) and instructed me that I may recite this ruqyah for whomever I wish. The Prophet (peace and blessings be upon him) said to me: Say:

“Our Lord is Allah, Who is in the heavens, sanctified is Your Name, Your command is in the heaven and the earth. O Allah! Just as Your command is in the heaven, so make Your mercy upon us in the earth. O Allah! Lord of the pure ones! Forgive our sins, our faults, and our mistakes, and send down a mercy from Your mercy and a healing from Your healing upon the illness that is with so-and-so.”

(That is: O our Lord Who is in the heavens, Your Name is holy, Your command prevails in the heaven and the earth. O Allah! Just as Your command is in the heaven, likewise, bestow Your mercy upon us on the earth. O Allah! Lord of the pure ones! Forgive our sins and pardon our mistakes. Send down a portion of Your mercy and a portion of Your healing upon the illness that is with so-and-so.)

Thus, he would be cured. The Prophet (peace and blessings be upon him) also said: This ruqyah should be recited three times, and then Surah al-Falaq and Surah an-Nas should be recited three times each.