Sahih Muslim 763f
Ibn 'Abbas reported that he spent a night in the house of his matenial aunt, Maimuna. The Messenger of Allah (may peace he upon him) got up at night and performed short ablution (taking water) from the water-skin hanging there. (Giving a description of the ablution Ibn 'Abbas said: It was short and performed with a little water.) I also got up and did the same as the Apostle of Allah ﷺ had done. I then came (to him) and stood on his left. He then made me go around to his right side. He then observed prayer and went to sleep till he began to snore. Bilal came to him and informed him about the prayer. He (the Holy Prophet) then went out and observed the dawn prayer without performing ablution. Sufyan said: It was a special (prerogative of the) Apostle of Allah ﷺ for it has been conveyed to us that the eyes of the Apostle of Allah ﷺ sleep, but his heart does not sleep.
حَدَّثَنَا ابْنُ أَبِي عُمَرَ، وَمُحَمَّدُ بْنُ حَاتِمٍ، عَنِ ابْنِ عُيَيْنَةَ، - قَالَ ابْنُ أَبِي عُمَرَ حَدَّثَنَا سُفْيَانُ، - عَنْ عَمْرِو بْنِ دِينَارٍ، عَنْ كُرَيْبٍ، مَوْلَى ابْنِ عَبَّاسٍ عَنِ ابْنِ عَبَّاسٍ، أَنَّهُ بَاتَ عِنْدَ خَالَتِهِ مَيْمُونَةَ فَقَامَ رَسُولُ اللَّهِ ﷺ مِنَ اللَّيْلِ فَتَوَضَّأَ مِنْ شَنٍّ مُعَلَّقٍ وُضُوءًا خَفِيفًا - قَالَ وَصَفَ وُضُوءَهُ وَجَعَلَ يُخَفِّفُهُ وَيُقَلِّلُهُ - قَالَ ابْنُ عَبَّاسٍ فَقُمْتُ فَصَنَعْتُ مِثْلَ مَا صَنَعَ النَّبِيُّ ﷺ ثُمَّ جِئْتُ فَقُمْتُ عَنْ يَسَارِهِ فَأَخْلَفَنِي فَجَعَلَنِي عَنْ يَمِينِهِ فَصَلَّى ثُمَّ اضْطَجَعَ فَنَامَ حَتَّى نَفَخَ ثُمَّ أَتَاهُ بِلاَلٌ فَآذَنَهُ بِالصَّلاَةِ فَخَرَجَ فَصَلَّى الصُّبْحَ وَلَمْ يَتَوَضَّأْ . قَالَ سُفْيَانُ وَهَذَا لِلنَّبِيِّ ﷺ خَاصَّةً لأَنَّهُ بَلَغَنَا أَنَّ النَّبِيَّ ﷺ تَنَامُ عَيْنَاهُ وَلاَ يَنَامُ قَلْبُهُ .