It is narrated from Sayyiduna Jabir bin Abdullah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: When every man and woman sleeps, a leather rope is tied on their head and three knots are made on their head. When he wakes up and remembers Allah Almighty, one knot is untied; when he gets up and performs ablution, the second knot is untied; and when he offers prayer, all the knots are untied.