Sahih Bukhari
Invocations
Volume: 008 / Book Number: 075 / Hadith Number: 331
Narrated 'Aisha:
Whenever Allah's Apostle went to bed, he used to blow on his hands while reciting the Mu'auwidhat ( i.e. Suratal-Falaq and Surat-an-Nas, 113 and 114) and then pass his hands over his body,