‘Aishah reports that the Messenger of Allah said: “When one of you gets up during the night for prayer and his Qur’anic recital becomes confused to the extent that he does not know what he says, he should lie down.” This is related by Muslim.
Anas narrates that the Messenger of Allah entered the mosque and saw a rope stretching between two posts. He asked: “What is this?” The people told him that it was for Zainab [bint Jahsh] who, when she became tired or weary, held it (to keep standing for the prayer). The Prophet said: “Remove the rope. You should pray as long as you feel active, and when you get tired or weary, you should lie down to rest.” This is related by al-Bukhari and Muslim.
One should not overburden one’s self with the night prayer and should only pray it to the extent that is reasonable, and not leave that practice unless there is some great need to do so. ‘Aishah reports that the Messenger of Allah said: “Do (good) deeds according to your capacity, for by Allah, Allah does not weary from giving rewards unless you get tired of doing good deeds.” This is related by al-Bukhari and Muslim.
Al-Bukhari and Muslim also relate from ‘Aishah that the Messenger of Allah was asked: “What is the most loved deed to Allah?” He answered: “One that is performed constantly even if it is a small deed.” And Muslim recorded that ‘Aishah said: “The Messenger of Allah was constant in his deeds, and if he did something, he would do it consistently.”
‘Abdullah ibn ‘Umar reports that the Messenger of Allah said: “O ‘Abdullah, do not become like so-and-so who used to make the tahajjud prayers and then he stopped praying it.” This is related by al-Bukhari and Muslim.
Al-Bukhari and Muslim also record, on the authority of ‘Abdullah ibn Mas’ud, that it was mentioned to the Prophet sallallahu alehi wasallam that a man slept until the morning. [ThereuponJ he said: “Satan has urinated into the ears of that person.” They also record from Salim ibn ‘Abdullah ibn ‘Umar, from his father, that the Messenger of Allah said to his father, “Abdullah would be a good man if he would pray the tahajjud prayers.” Salim said: “After that, ‘Abdullah would not sleep during the night save for a small amount at a time.”