When the Prophet (may Allah’s peace and blessings be upon him) went to bed every night, he would join his palms together and blow into them and recite the Surahs al-Ikhlās, al-Falaq, and an-Nās,

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.