Sahih Muslim , Book 26, Hadith 5434 (USC-MSA) ⓘ
'A'isha reported Allah's Messenger as saying: When Allah's Messenger visited the sick he would say: Lord of the people. remove the disease, cure him, for Thou art the great Curer, there is no cure but through Thine healing Power, which leaves nothing of the disease.
وَحَدَّثَنَا شَيْبَانُ بْنُ فَرُّوخَ، حَدَّثَنَا أَبُو عَوَانَةَ، عَنْ مَنْصُورٍ، عَنْ إِبْرَاهِيمَ، عَنْ مَسْرُوقٍ، عَنْ عَائِشَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ إِذَا عَادَ مَرِيضًا يَقُولُ " أَذْهِبِ الْبَاسَ رَبَّ النَّاسِ اشْفِهِ أَنْتَ الشَّافِي لاَ شِفَاءَ إِلاَّ شِفَاؤُكَ شِفَاءً لاَ يُغَادِرُ سَقَمًا " .
also referenced under: Book 39, Hadith 63 (In-Book) & Hadith 2191 (Reference)