Night Prayer (Tahajjud) and Qiyam al-Layl in the Holy Quran

(78) Establish prayer at the decline of the sun [from its meridian] until the darkness of the night and [also] the Qur'an of dawn. Indeed, the recitation of dawn is ever witnessed.

(79) And from [part of] the night, pray with it as additional [worship] for you; it is expected that your Lord will resurrect you to a praised station.

(40) And [in part] of the night exalt Him and after prostration.

(17) They used to sleep but little of the night,

(18) And in the hours before dawn they would ask forgiveness,

(48) And be patient, [O Muhammad], for the decision of your Lord, for indeed, you are in Our eyes. And exalt [Allah] with praise of your Lord when you arise.

(49) And in a part of the night exalt Him and after [the setting of] the stars.

(1) O you who wraps himself [in clothing],

(2) Arise [to pray] the night, except for a little -

(3) Half of it - or subtract from it a little

(4) Or add to it, and recite the Qur'an with measured recitation.

(5) Indeed, We will cast upon you a heavy word.

(6) Indeed, the hours of the night are more effective for concurrence [of heart and tongue] and more suitable for words.

(7) Indeed, for you by day is prolonged occupation.

(20) Indeed, your Lord knows, [O Muhammad], that you stand [in prayer] almost two thirds of the night or half of it or a third of it, and [so do] a group of those with you. And Allah determines [the extent of] the night and the day. He has known that you [Muslims] will not be able to do it and has turned to you in forgiveness, so recite what is easy [for you] of the Qur'an. He has known that there will be among you those who are ill and others traveling throughout the land seeking [something] of the bounty of Allah and others fighting for the cause of Allah. So recite what is easy from it and establish prayer and give zakah and loan Allah a goodly loan. And whatever good you put forward for yourselves - you will find it with Allah. It is better and greater in reward. And seek forgiveness of Allah. Indeed, Allah is Forgiving and Merciful.

(26) And during the night prostrate to Him and exalt Him a long [part of the] night.