Narrated Abdullah Ibn Abbas: In Surat al-Muzzammil (73), the verse: "Keep vigil at night but a little, a half thereof" (2-3) has been abrogated by the following verse: "He knoweth that ye count it not, and turneth unto you in mercy. Recite then of the Quran that which is easy for you" (v. 20). The phrase "the vigil of the night" (nashi'at al-layl) means the early hours of the night. They (the companions) would pray (the tahajjud prayer) in the early hours of the night. He (Ibn Abbas) says: It is advisable to offer the prayer at night (tahajjud), prescribed by Allah for you (in the early hours of the night). This is because when a person sleeps, he does not know when he will awake. The words "speech more certain" (aqwamu qilan) means that this time is more suitable for the understanding of the Quran. He says: The verse: "Lo, thou hast by day a chain of business" (v. 7) means engagement for long periods (in the day's work).

Narrated Ibn Abbas: When the opening verses of Surah Al-muzammil was revealed, the Companions would pray as long as they would pray during Ramadan until its last verses were revealed. The period between the revelation of its opening and the last verses was one year.

Narrated Abu Hurairah: The Messenger of Allah صلی اللہ علیہ وسلم as saying: When one you sleeps, the devil ties three knots at the back of his neck, sealing every knot with, "You have a long night, so sleep. " So if one awakes and mentions Allah, a knot will be loosened; if he performs ablution another knot will be loosened; and if he prays, the third knot will be loosened; and in the morning he will be active and in good spirits; otherwise he will be in bad spirits and sluggish.

Narrated Aishah, Ummul Muminin: Do not give up prayer at night, for the Messenger of Allah صلی اللہ علیہ وسلم would not leave it. Whenever he fell ill or lethargic, he would offer it sitting.

Narrated Abu Hurairah: The Prophet صلی اللہ علیہ وسلم said: May Allah have mercy on a man who gets up at night and prays, and awakens his wife; if she refuses, he should sprinkle water on her face. May Allah have mercy on a woman who gets up at night and prays, and awakens her husband; if he refuses, she would sprinkle water on his face.

Narrated Abu Saeed and Abu Hurairah: The Prophet صلی اللہ علیہ وسلم said: If a man awakens his wife at night, and then both pray or both offer two rak'ahs together, the (name of the)man will be recorded among those who mention the name of Allah, and the (name of the) woman will be recorded among those who mention the name of Allah. Ibn Kathir did not narrate this tradition as a statement of the Prophet صلی اللہ علیہ وسلم , but he reported it as a statement of Abu Saeed. Abu Dawud said: This tradition has been narrated by Ibn Mahdi from Sufyan and I think he mentioned the name of Sufyan. He also said: The tradition transmitted by Sufyan is a statement of the Companion (and not that of the Prophet).

Narrated Aishah, wife of Prophet صلی اللہ علیہ وسلم : When one of you dozes in prayer he should sleep till his sleep is gone, for when one of you prays while he is dozing, perhaps he might curse himself if he begs pardon of Allah.

Narrated Abu Hurairah: The Messenger of Allah صلی اللہ علیہ وسلم as saying: When one of you gets up by night (to pray), and falters in reciting the Quran (due to sleep), and he does not understand what he utters, he should sleep.

Narrated Anas: The Messenger of Allah صلی اللہ علیہ وسلم entered the mosque (and saw that) a rope tied between two pillars. He asked: What is this rope (for) ? The people told him: This is (for) Hamnah bin Jahsh who prays (here). When she is tired, she reclines on it. The Messenger of Allah صلی اللہ علیہ وسلم said: She should pray as much as she has strength. When she is tired, she should sit down. This version of Ziyad has: He said: What is this ? The people told him: This is for Zainab who prays. When she becomes lazy, or is tired, she holds it. He said: Undo it. One of you should pray in good spirits. When he is lazy or tired, he should sit down.

Narrated Umar bin Al-Khattab: The Messenger of Allah صلی اللہ علیہ وسلم as saying: He who misses him daily round of recital or part of it due to sleep and he recites it between the dawn and the noon prayers, will be reckoned as if he recited it at night.