Narrated 'Ubada bin As-Samit:
The Prophet (ﷺ) "Whoever gets up at night and says: -- 'La ilaha il-lallah Wahdahu la Sharika lahu Lahu-lmulk, waLahu-l-hamd wahuwa 'ala kullishai'in Qadir. Al hamdu lil-lahi wa subhanal-lahi wa la-ilaha il-lal-lah wa-l-lahu akbar wa la hawla Wala Quwata il-la-bil-lah.' (None has the right to be worshipped but Allah. He is the Only One and has no partners . For Him is the Kingdom and all the praises are due for Him. He is Omnipotent. All the praises are for Allah. All the glories are for Allah. And none has the right to be worshipped but Allah, And Allah is Great And there is neither Might nor Power Except with Allah). And then says: -- Allahumma, Ighfir li (O Allah! Forgive me). Or invokes (Allah), he will be responded to and if he performs ablution (and prays), his prayer will be accepted."
Narrated Abu Huraira:
Allah's Messenger (ﷺ) said, "Satan puts three knots at the back of the head of any of you if he is asleep. On every knot he reads and exhales the following words, 'The night is long, so stay asleep.' When one wakes up and remembers Allah, one knot is undone; and when one performs ablution, the second knot is undone, and when one prays the third knot is undone and one gets up energetic with a good heart in the morning; otherwise one gets up lazy and with a mischievous heart."
Narrated Abu Huraira:
Allah's Messenger (ﷺ) said, "During your sleep, Satan knots three knots at the back of the head of each of you, and he breathes the following words at each knot, 'The night is, long, so keep on sleeping,' If that person wakes up and celebrates the praises of Allah, then one knot is undone, and when he performs ablution the second knot is undone, and when he prays, all the knots are undone, and he gets up in the morning lively and in good spirits, otherwise he gets up in low spirits and lethargic."
Narrated `Abdullah:
A person was mentioned before the Prophet (p.b.u.h) and he was told that he had kept on sleeping till morning and had not got up for the prayer. The Prophet (ﷺ) said, "Satan urinated in his ears."