(12) باب التَّعَوُّذِ وَالْقِرَاءَةِ عِنْدَ الْمَنَامِ
Narrated `Aisha:
Whenever Allah's Messenger (ﷺ) went to bed, he used to blow on his hands while reciting the Mu'auwidhat ( i.e. Suratal-Falaq 113 and Surat-an-Nas 114) and then pass his hands over his body.
Reference: Sahih al-Bukhari 6319
In-book reference: Book 80, Hadith 16
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 8, Book 75, Hadith 331