The Book of Qiyam Al-Lail (The Night Prayer) and Voluntary Prayers During the Day
20/41. Chapter:
How to pray witr with five rak'ahs, and the differences reported from Al-Hakam in the hadith about Witr
Sunan an-Nasai
أَخْبَرَنَا الْقَاسِمُ بْنُ زَكَرِيَّا بْنِ دِينَارٍ، قَالَ حَدَّثَنَا عُبَيْدُ اللَّهِ، عَنْ إِسْرَائِيلَ، عَنْ مَنْصُورٍ، عَنِ الْحَكَمِ، عَنْ مِقْسَمٍ، عَنِ ابْنِ عَبَّاسٍ، عَنْ أُمِّ سَلَمَةَ، قَالَتْ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يُوتِرُ بِسَبْعٍ أَوْ بِخَمْسٍ وَلاَ يَفْصِلُ بَيْنَهُنَّ بِتَسْلِيمٍ .
Mansur reported from Al-Hakam, from Miqsam, from Ibn 'Abbas that Umm Salamah said: "The Messenger of Allah (ﷺ) used to pray witr with seven or five (rak'ahs), not separating between them with the taslim."
Reference : Sunan an-Nasa'i 1715In-book reference : Book 20, Hadith 118English translation : Vol. 2, Book 20, Hadith 1716