'A’isha said:

"When Allah’s Messenger (ﷺ) went to his mattress each night, he joined the palms of his hands, then breathed into them and recited into them: “Say: ‘He is Allah, One [qul Huwa'llahu Ahad]!' (Al-Qur'an;112:1), and: “Say: ‘I take refuge with the Lord of the Daybreak [qul a'udhu bi-Rabbil-falaq]!' (Al-Qur'an;113:1), and: “Say: ‘I take refuge with the Lord of humankind [qul a'udhu bi-Rabbi’n-nas]!' (Al-Qur'an;114:1), Then he passed them over as much of his body as he could, beginning with his head and his face and the front of his body, doing that three times.”

حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، قَالَ‏:‏ حَدَّثَنَا الْمُفَضَّلُ بْنُ فَضَالَةَ، عَنْ عُقَيْلٍ، أُرَاهُ عَنِ الزُّهْرِيِّ، عَنْ عُرْوَةَ، عَنْ عَائِشَةَ، قَالَتْ‏:‏ كَانَ رَسُولُ اللهِ صلى الله عليه وسلم، إِذَا أَوَى إِلَى فِرَاشِهِ كُلَّ لَيْلَةٍ جَمَعَ كَفَّيْهِ فَنَفَثَ فِيهِمَا، وَقَرَأَ فِيهِمَا‏:‏ قُلْ هُوَ اللَّهُ أَحَدٌ وَ قُلْ أَعُوذُ بِرَبِّ الْفَلَقِ وَ قُلْ أَعُوذُ بِرَبِّ النَّاسِ، ثُمَّ مَسَحَ بِهِمَا مَا اسْتَطَاعَ مِنْ جَسَدِهِ، يَبْدَأُ بِهِمَا رَأْسَهُ وَوَجْهَهُ وَمَا أَقْبَلَ مِنْ جَسَدِهِ، يَصْنَعُ ذَلِكَ ثَلاثَ مَرَّاتٍ‏.‏