مُوَطَّأُ مَالِكٍ
Muwatta Malik 255
Tahajjud
حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ مُحَمَّدِ بْنِ الْمُنْكَدِرِ، عَنْ سَعِيدِ بْنِ جُبَيْرٍ، عَنْ رَجُلٍ، عِنْدَهُ رِضًا أَنَّهُ أَخْبَرَهُ أَنَّ عَائِشَةَ زَوْجَ النَّبِيِّ صلى الله عليه وسلم أَخْبَرَتْهُ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ مَا مِنِ امْرِئٍ تَكُونُ لَهُ صَلاَةٌ بِلَيْلٍ يَغْلِبُهُ عَلَيْهَا نَوْمٌ إِلاَّ كَتَبَ اللَّهُ لَهُ أَجْرَ صَلاَتِهِ وَكَانَ نَوْمُهُ عَلَيْهِ صَدَقَةً .
Yahya related to me from Malik from Muhammad ibn al-Munkadir from Said ibn al-Jubayr that a man who has approval (as a relater of hadith), told him that A'isha, the wife of the Prophet, (ﷺ), said, "If a man prays in the night and sleep overcomes him during it, Allah writes for him the reward of his prayer, and his sleep is sadaqa for him."
Arabic/English book reference: Book 7, Hadith 1