Riyad as-Salihin

'Aishah (May Allah be pleased with her) reported: When the Prophet (ﷺ) visited any ailing member of his family, he would touch the sick person with his right hand and would supplicate: "Allahumma Rabban-nasi, adhhibil-ba'sa, washfi, Antash-Shafi, la shifa'a illa shifa'uka, shifaan la yughadiru saqaman [O Allah! the Rubb of mankind! Remove this disease and cure (him or her)! You are the Great Curer. There is no cure but through You, which leaves behind no disease]."

[Al-Bukhari and Muslim].