An Invocation for Pain of the Legs
Khaddash b. Sabra narrated from Muhammad b. Jamhur from Safwan Bayya’ al-Sabiri from Salim b. Muhammad, who said: I complained to al-Sadiq, peace be upon him, of pain in my legs (al-saqayn) and that it had prevented me from pursuing my affairs and earning my living. He said: “Recite an invocation of protection over them.” I asked: “With what, O son of the Messenger of Allah?” He said: “With this verse. Recite it seven times and you will be cured, Allah, the Exalted, willing:
Recite what has been revealed to thee of the Book of thy Lord; no man can change His words. Apart from Him, thou wilt find no refuge. (18:27).”
He said: I recited the invocation over them seven times, as he had instructed me, and I never experienced the pain again.