Aisha reported: The Messenger of Allah, peace and blessings be upon him, when anyone from his family was sick, he would blow over them with the two chapters of refuge. When he was sick with the illness in which he died, I blew over him and wiped himself with his hands, as they had greater blessings than my hand.
Source: Ṣaḥīḥ Muslim 2192
Grade: Sahih (authentic) according to Muslim
عَنْ عَائِشَةَ قَالَتْ كَانَ رَسُولُ اللهِ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ إِذَا مَرِضَ أَحَدٌ مِنْ أَهْلِهِ نَفَثَ عَلَيْهِ بِالْمُعَوِّذَاتِ فَلَمَّا مَرِضَ مَرَضَهُ الَّذِي مَاتَ فِيهِ جَعَلْتُ أَنْفُثُ عَلَيْهِ وَأَمْسَحُهُ بِيَدِ نَفْسِهِ لِأَنَّهَا كَانَتْ أَعْظَمَ بَرَكَةً مِنْ يَدِي
2192 صحيح مسلم كتاب السلام باب رقية المريض بالمعوذات والنفث