How was the night prayer of the Holy Prophet (sa)?

عَنِ الأَسْوَدِ، قَالَ سَأَلْتُ عَائِشَةَ رضى اللّٰہ عنها كَيْفَ صَلاَةُ النَّبِيِّ صلّى اللّٰہ عليه وسلم بِاللَّيْلِ قَالَتْ كَانَ يَنَامُ أَوَّلَهُ وَيَقُومُ آخِرَهُ، فَيُصَلِّي ثُمَّ يَرْجِعُ إِلَى فِرَاشِهِ، فَإِذَا أَذَّنَ الْمُؤَذِّنُ وَثَبَ، فَإِنْ كَانَ بِهِ حَاجَةٌ اغْتَسَلَ، وَإِلاَّ تَوَضَّأَ وَخَرَجَ‏.‏

Hazrat Aswad^ra narrated that, “I asked Aisha^ra, ‘How did the Prophet^sa spend the night in prayer?’ She answered, ‘He would sleep during the first part of the night, then rise in its latter portion and perform his prayers. Afterwards, he would return to his bed. When the muezzin gave the call to prayer, he would rise swiftly; if he required a ritual bath, he would take it; otherwise, he would perform ablution and set out for the prayer.’”

(Sahih al-Bukhari, Kitab at-tahajjud, Bab man nama awwala l-layla wa ahya a-khirah, Hadith 1146)