Allâh's Messenger (ﷺ) said, "During your sleep, Satan knots three knots at the back of the head of each one of you. On every knot he reads and exhales the following words. ' The night is long for you so stay asleep. ' When that person wakes up and remembers Allah, one knot is undone; and when he performs ablution, the second knot is undone, and when he offers (prayer), the third knot is undone and he gets up energetic in a good mode and with a good heart in the morning; otherwise he gets up in a bad mode, lazy (and with not a good heart)." [2:243-O.B]