Ibn ‘Umar said that when ‘Umar consulted the Prophet about a vow he had made in the pre-Islamic period to spend a night in devotion in the sacred mosque, he said, “Fulfill your vow.”
‘A'isha said, “During his private devotional exercises God’s messenger would put his head near me when he was in the mosque, and I would comb it; and he entered the house only to relieve himself.”
Anas said that the Prophet was accustomed to engage in private devotion in the mosque during the last ten nights of Ramadan; but one year he omitted it and he engaged in it during twenty nights the next year.
Tirmidhi transmitted it, and Abu Dawud and Ibn Majah transmitted it from Ubayy b. Ka'b.
Abu Huraira said that the Qur’an was gone over* to the Prophet once annually, but that this was done twice in the year in which he died. He used to engage in private devotions in the mosque during ten nights every year, but he did this during twenty nights in the year in which he died.
*Mirqat remarks that some expositors say the passive is used here because the person who went over the Quran to the Prophet was well-known, viz. Gabriel.
