Hadith 1741

Ishawq bin Mansur informed us, he said: "Abu Dawud narrated to us, he said: Shu'ba narrated to us, from Qatadah, from Abdur-Rahman bin Abza, that The Messenger of Allah (SAW) 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 when he said the taslim, he would say: Subhanal-Malikil-Quddus (Glory be to the Sovereign, the Most Holy) three times, elongating his words the third time."

أَخْبَرَنَا إِسْحَاقُ بْنُ مَنْصُورٍ، قَالَ حَدَّثَنَا أَبُو دَاوُدَ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنْ قَتَادَةَ، عَنْ زُرَارَةَ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ أَبْزَى، عَنْ رَسُولِ اللَّهِ صلى الله عليه وسلم كَانَ يُوتِرُ بِـ ‏<A id="q50" name="q50" href="javascript:openquran(86,1,1)"><c_q50>{‏ سَبِّحِ اسْمَ رَبِّكَ الأَعْلَى ‏}</c_q50></a>‏ وَ ‏<A id="q51" name="q51" href="javascript:openquran(108,1,1)"><c_q51>{‏ قُلْ يَا أَيُّهَا الْكَافِرُونَ ‏}</c_q51></a>‏ وَ ‏<A id="q52" name="q52" href="javascript:openquran(111,1,1)"><c_q52>{‏ قُلْ هُوَ اللَّهُ أَحَدٌ ‏}</c_q52></a>‏ فَإِذَا فَرَغَ قَالَ ‏"‏ سُبْحَانَ الْمَلِكِ الْقُدُّوسِ ‏"‏ ‏.‏ ثَلاَثًا وَيَمُدُّ فِي الثَّالِثَةِ ‏.‏

Reference: 1117490
In-book reference: Book 20, Hadith 1741
Hadith 1741 - The Book of Qiyam Al-Lail (The Night Prayer) and Voluntary Prayers During the Day - Sunan an-Nasa'i - Sunnah.com