It was part of the Prophet's custom that when he went to bed, he would join his palms together and raise them as a supplicant does, and he would blow into them in a mild manner, along with little saliva. Meanwhile, he would recite the three surahs of al-Ikhlās, al-Falaq, and an-Nās. Then, he would wipe with his palms over as much of his body as he could, starting with his head, face, and the front part of his body, repeating this three times.