The Book of Qiyam Al-Lail (The Night Prayer) and Voluntary Prayers During the Day
20/54. Chapter:
The Tasbih after finishing witr and the variance reported from Sufyan about that
Sunan an-Nasai
أَخْبَرَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، قَالَ حَدَّثَنَا عَبْدُ الْعَزِيزِ بْنُ عَبْدِ الصَّمَدِ، قَالَ حَدَّثَنَا سَعِيدٌ، عَنْ قَتَادَةَ، عَنْ عَزْرَةَ، عَنْ سَعِيدِ بْنِ عَبْدِ الرَّحْمَنِ بْنِ أَبْزَى، عَنْ أَبِيهِ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يُوتِرُ بِـ { سَبِّحِ اسْمَ رَبِّكَ الأَعْلَى } وَ { قُلْ يَا أَيُّهَا الْكَافِرُونَ } وَ { قُلْ هُوَ اللَّهُ أَحَدٌ } وَإِذَا فَرَغَ قَالَ " سُبْحَانَ الْمَلِكِ الْقُدُّوسِ " . أَرْسَلَهُ هِشَامٌ .
It was narrated from Ibn Abdur-Rahman bin Abza from his father that: The Messenger of Allah (ﷺ) used to recite in witr: Glorify the Name of Your Lord, the Most High;' and "Say: O you disbelievers!'; and 'Say: He is Allah, (the) One." And after he had said the salam, he would say: Subhanal-Malikil-Quddus (Glory be to the Sovereign, the Most Holy).
Reference : Sunan an-Nasa'i 1754In-book reference : Book 20, Hadith 157English translation : Vol. 2, Book 20, Hadith 1755