Sahih Bukhari Volume 007, Book 070, Hadith Number 579.

Narrated By 'Aisha : Whenever Allah's Apostle paid a visit to a patient, or a patient was brought to him, he used to invoke Allah, saying, "Take away the disease, O the Lord of the people! Cure him as You are the One Who cures. There is no cure but Yours, a cure that leaves no disease."

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