Lady Aisha Siddiqa (may Allah be pleased with her) narrates: When a sick person was brought to the service of the Prophet Muhammad (peace and blessings be upon him), he (peace be upon him) would recite this supplication. He (peace be upon him) would say: "Remove the illness, O Lord of the people, grant healing, You are the Healer. There is no healing except Your healing. Grant such a healing that leaves behind no illness."
Hadith Referenceصحیح ابن حبان / كتاب الجنائز وما يتعلق بها مقدما أو مؤخرا / 2972
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح: ق - انظر ما قبله.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح