Sahih Muslim Book - 6, Hadith - 1744

وَحَدَّثَنَا عَلِىُّ بْنُ خَشْرَمٍ أَخْبَرَنَا عِيسَى - وَهُوَ ابْنُ يُونُسَ - عَنْ شُعْبَةَ عَنْ قَتَادَةَ عَنْ زُرَارَةَ عَنْ سَعْدِ بْنِ هِشَامٍ الأَنْصَارِىِّ عَنْ عَائِشَةَ قَالَتْ كَانَ رَسُولُ اللَّهِ -صلى الله عليه وسلم- إِذَا عَمِلَ عَمَلاً أَثْبَتَهُ وَكَانَ إِذَا نَامَ مِنَ اللَّيْلِ أَوْ مَرِضَ صَلَّى مِنَ النَّهَارِ ثِنْتَىْ عَشْرَةَ رَكْعَةً. قَالَتْ وَمَا رَأَيْتُ رَسُولَ اللَّهِ -صلى الله عليه وسلم- قَامَ لَيْلَةً حَتَّى الصَّبَاحِ وَمَا صَامَ شَهْرًا مُتَتَابِعًا إِلاَّ رَمَضَانَ.

It was narrated that 'Aishah said: "If the Messenger of Allah (s.a.w) did an action, he would persist in it. If he slept at night or was sick, he would pray twelve Rak'ah during the day." She said: "And I never saw the Messenger of Allah (s.a.w) spend an entire night in prayer until dawn, or fast an entire month except Ramadan."