...from his father, that the Messenger of Allah ﷺ used to pray witr with "Glorify the name of your Lord, the Most High" [Ala 87:1], "Say, you disbelievers" [Kafirun 109:1], and "Say, He is Allah, the One" [Ikhlas 112:1]. When he gave the closing salam he would say, "Glory be to the King, the Most Holy," three times, raising his voice on the third.
ى، عن أبيه، أن رسول الله ﷺ كان يوتر ب {سبح اسم ربك الأعلى} و {قل يأيها الكفرون} و {قل هو الله أحد}. وكان يقول إذا سلم: سبحان الملك القدوس ثلاثا ويرفع صوته بالثالثة.
Nasai (1732) narrated it from Amr bin Yazid, who said, Bahz bin Assad narrated to us, who said, Shuba narrated to us, from Salama and Zubayd, from Dhirr, from Ibn Abdul-Rahman bin Abza, and he mentioned it. Its isnad is sahih, and the discussion on it is elaborated in the book on prayer.