Yahya related to me from Malik from Abu'z-Zinad from al-Araj fromAbu Hurayra that the Messenger of Allah, may Allah bless him and granthim peace, said, "Shaytan ties three knots at the back of your headwhen you sleep, and he seals the place of each knot with 'You have along night ahead, so sleep.' If you wake up and remember Allah, a knotis untied. If you do wudu, a knot is untied. If you pray, a knot isuntied, and morning finds you lively and in good spirits, and if not,morning finds you in bad spirits and lazy."