The Prophet ﷺ used to treat some of his wives by passing his right hand over the place of ailment and used to say, "O Allah, the Lord of the people! Remove the trouble and heal the patient, for You are the Healer. No healing is of any avail but Yours; healing that will leave behind no ailment." (Using translation from Bukhārī 5743)  

أَنَّ رَسُولَ اللهِ ﷺ كَانَ يُعَوِّذُ بَعْضَ أَهْلِهِ يَمْسَحُ بِيَدِهِ وَيَقُولُ «اللهُمَّ رَبَّ النَّاسِ أَذْهِبِ الْبَأْسَ وَاشْفِ أَنْتَ الشَّافِي لَا شِفَاءَ إِلَّا شِفَاءَكَ شِفَاءً لَا يُغَادِرُ سَقَمًا» قَالَ سُفْيَانُ فَحَدَّثْتُهُ مَنْصُورًا فَحَدَّثَنِي عَنْ إِبْرَاهِيمَ عَنْ مَسْرُوقٍ عَنْ عَائِشَةَ بِنَحْوِهِ