Mishkat al-Masabih
Mishkat al-Masabih 1274, 1275
وَعَنْ أُبَيِّ بْنِ كَعْبٍ قَالَ: كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذَا سَلَّمَ فِي الْوتر قَالَ: «سُبْحَانَكَ الْمَلِكِ الْقُدُّوسِ» رَوَاهُ أَبُو دَاوُدَ وَالنَّسَائِيُّ وَزَادَ: ثَلَاث مَرَّات يُطِيل فِي آخِرهنَّ وَفِي رِوَايَةٍ لِلنَّسَائِيِّ عَنْ عَبْدِ الرَّحْمَنِ بْنِ أَبْزَى عَنْ أَبِيهِ قَالَ: كَانَ يَقُولُ إِذَا سَلَّمَ: «سُبْحَانَ الْمَلِكِ الْقُدُّوسِ» ثَلَاثًا وَيَرْفَعُ صَوْتَهُ بالثالثة
Unreviewed translation. All hadiths in this collection are available in five languages. Titles and introductions may remain in Arabic.
Ubayy ibn Ka’b said that when the Messenger of God gave the salutation after witr, he said: Glory be to You, Sovereign, Most Holy. Abu Dawud and al-Nasa’i transmitted it. Al-Nasa’i adds that he said this three times, prolonging it on the last. In another report from al-Nasa’i, Abd al-Rahman ibn Abza reported from his father that the Prophet would say, Glory be to the Sovereign, Most Holy, three times after the salutation, raising his voice on the third.