أَخْبَرَنَا إِسْمَاعِيلُ بْنُ مَسْعُودٍ، قَالَ حَدَّثَنَا خَالِدٌ، قَالَ حَدَّثَنَا هِشَامٌ، قَالَ حَدَّثَنَا يَحْيَى، عَنْ أَبِي سَلَمَةَ، أَنَّهُ سَأَلَ عَائِشَةَ عَنْ صَلاَةِ، رَسُولِ اللَّهِ صلى الله عليه وسلم بِاللَّيْلِ قَالَتْ كَانَ يُصَلِّي ثَلاَثَ عَشْرَةَ رَكْعَةً يُصَلِّي ثَمَانَ رَكَعَاتٍ ثُمَّ يُوتِرُ ثُمَّ يُصَلِّي رَكْعَتَيْنِ وَهُوَ جَالِسٌ فَإِذَا أَرَادَ أَنْ يَرْكَعَ قَامَ فَرَكَعَ وَيُصَلِّي رَكْعَتَيْنِ بَيْنَ الأَذَانِ وَالإِقَامَةِ فِي صَلاَةِ الصُّبْحِ .
It was narrated from Abu Salamah that : He asked Aishah about the prayer of the Messenger of Allah (PBUH) at night. She said: "He used to pray thirteen rak'ahs. He would pray eight rak'ahs then pray witr, then pray two rak'ahs sitting down. When he wanted to bow he would stand and bow, and he prayed two rak'ahs between the adhan and iqamah of subh prayer. Translation Not Available
Book Ref: Sunan An Nisai Book 20 Hadith 1781
Web Ref: Sunan An Nisai Vol 2 Book 20 Hadith 1782