To stand for prayer late at night, when no human can
see you, gives tranquility and serenity to the heart. In an authentic hadith,
the Prophet (bpuh) said that waking up late at night, remembering Allah, making
ablution, and then standing for prayer makes one active and joyful.
(They used to sleep but little by night [invoking
their Lord and praying, with fear and hope].)
(Quran 51 : 17)
(And in some parts of the night [also] offer the
prayer with it [i.e. recite the Qur'an in the prayer], as an additional prayer
[Tahajjud: optional prayer]...) (Qur'an 17: 79)
An authentic hadith in Abu Dawood indicates that
performing the late-night prayer removes sickness from the body. The Prophet (bpuh)
"Don't be like so and so. He used to stand at
night (for prayer), and then he abandoned doing so."
The following is related in a narration from 'Abdullah
ibn 'Umar (may Allah be pleased with him):
"Abdullah is a good man, but would that he stood
at night (for prayer)."
Don't grieve over things that are fleeting: everything
in this universe will perish except Allah.
Everything will perish save His Face. (Quran 28: 88)
(Whatsoever is on it [the earth] will perish. And the
Face of your Lord full of Majesty and Honor will abide forever) (Qur'an