Sayyida Aisha Siddiqa (may Allah be pleased with her) narrates: When the Prophet Muhammad (peace be upon him) would lie down on his bed, he would join his two palms together and blow on them. He would recite Surah Ikhlas, Surah Falaq, and Surah Nas in them and then pass his hands over his body as far as he could reach. He would do this three times.
Hadith Referenceصحیح ابن حبان / كتاب الزينة والتطييب / 5544
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح: خ - انظر ما قبله.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح