Sahih al-Bukhari, Hadith 5017 ⓘ
Narrated 'Aisha: Whenever the Prophet went to bed every night, he used to cup his hands together and blow over it after reciting Surat Al-Ikhlas, Surat Al-Falaq and Surat An-Nas, and then rub his hands over whatever parts of his body he was able to rub, starting with his head, face and front of his body. He used to do that three times.
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا الْمُفَضَّلُ، عَنْ عُقَيْلٍ، عَنِ ابْنِ شِهَابٍ، عَنْ عُرْوَةَ، عَنْ عَائِشَةَ، أَنَّ النَّبِيَّ صلى الله عليه وسلم كَانَ إِذَا أَوَى إِلَى فِرَاشِهِ كُلَّ لَيْلَةٍ جَمَعَ كَفَّيْهِ ثُمَّ نَفَثَ فِيهِمَا فَقَرَأَ فِيهِمَا {قُلْ هُوَ اللَّهُ أَحَدٌ} وَ{قُلْ أَعُوذُ بِرَبِّ الْفَلَقِ} وَ{قُلْ أَعُوذُ بِرَبِّ النَّاسِ} ثُمَّ يَمْسَحُ بِهِمَا مَا اسْتَطَاعَ مِنْ جَسَدِهِ يَبْدَأُ بِهِمَا عَلَى رَأْسِهِ وَوَجْهِهِ وَمَا أَقْبَلَ مِنْ جَسَدِهِ يَفْعَلُ ذَلِكَ ثَلاَثَ مَرَّاتٍ.
also referenced under: Book 66, Hadith 39 (In-Book) & Volume 6, Book 61, Hadith 536 (USC-MSA)