Narrated `Abdullah bin `Umar: A man said, "O Allah's Apostle! How is the prayer of the night?" He said, "Two rak`at followed by two rak`at and so on, and when you apprehend the approaching dawn, offer one rak`a as witr."

Narrated Ibn `Abbas: The prayer of the Prophet used to be of thirteen rak`at, i.e. of the night prayer.

Narrated Masruq: I asked Aisha about the night prayer of Allah's Apostle and she said, "It was seven, nine or eleven rak`at besides the two rak`at of the Fajr prayer (i.e. Sunna). "

Narrated `Aisha: The Prophet (p.b.u.h) used to offer thirteen rak`at of the night prayer and that included the witr and two rak`at (Sunna) of the Fajr prayer.

Narrated Anas bin Malik: Sometimes Allah's Apostle would not fast (for so many days) that we thought that he would not fast that month and he sometimes used to fast (for so many days) that we thought he would not leave fasting throughout that month and (as regards his prayer and sleep at night), if you wanted to see him praying at night, you could see him praying and if you wanted to see him sleeping, you could see him sleeping.

Narrated Abu Huraira: Allah's Apostle 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 Samura bin Jundab: The Prophet said in his narration of a dream that he saw, "He whose head was being crushed with a stone was one who learnt the Qur'an but never acted on it, and slept ignoring the compulsory prayers."

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 said, "Satan urinated in his ears."