From Sahih Bukhari (Hadith 5675):
Narrated `Aisha:Whenever Allah's Messenger (ﷺ) 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
Reference: Bukhari 5675