الجامع المختصر لفضائل الآيات والسور
Virtues of the Qur'an's Chapters and Verses
The Messenger ﷺ would recite these suwar for healing from sickness
كَانَ الرَّسُولُ ﷺ يَقْرَأُ هَاتَيْنِ السُّورَتَيْنِ للشِّفَاءِ مِنَ الْمَرَضِ
Virtues of the Qur'an's Chapters and Verses 88
A’isha (RA) reported that whenever the Prophet ﷺ became sick, he would recite the Mu’awwidhāt (Sūrat Al-Falaq and Sūrat An-Nās) and then blow his breath over his body. When he became seriously ill, I used to recite (these two suwar) and rub his hands over his body hoping for its blessings. Reference: Sahih al-Bukhari 5016.
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ، أَخْبَرَنَا مَالِكٌ، عَنِ ابْنِ شِهَابٍ، عَنْ عُرْوَةَ، عَنْ عَائِشَةَ، رضى الله عنها أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ إِذَا اشْتَكَى يَقْرَأُ عَلَى نَفْسِهِ بِالْمُعَوِّذَاتِ وَيَنْفُثُ، فَلَمَّا اشْتَدَّ وَجَعُهُ كُنْتُ أَقْرَأُ عَلَيْهِ وَأَمْسَحُ بِيَدِهِ رَجَاءَ بَرَكَتِهَا‏.‏
Reference : Virtues of the Qur'an's Chapters and Verses 88