'A'isha reported that when Messenger of Allah ﷺ fell ill, he recited over his body Mu'awwidhatan and blew over him and when his sickness was aggravated I used to recite over him and rub him with his band with the hope that it was more blessed. (Using translation from Muslim 2192b)  

أَنَّ رَسُولَ اللهِ ﷺ كَانَ «إِذَا اشْتَكَى يَقْرَأُ عَلَى نَفْسِهِ بِالْمُعَوِّذَاتِ وَيَنْفُثُ فَلَمَّا اشْتَدَّ وَجَعُهُ كُنْتُ أَقْرَأُ عَلَيْهِ وَأَمْسَحُ عَلَيْهِ» فِي حَدِيثِ الْحَارِثِ «عَنْهُ بِيَدِهِ رَجَاءَ بَرَكَتِهَا»