Ubayy reported: "In the first rakʿah of witr (prayer), the Messenger of Allah (ﷺ) ﷺ used to recite: “Sabbiḥ isma rabbikal-aʿlā (Sūrat al-Aʿlā), in the second, Qul yā ayyuhal kāfirūn (Sūrat al-Kāfirūn), and in the third (rakʿah), Qul huwa Allāhu aḥad (Sūrat al-Ikhlāṣ).” Reference: Sunan an-Nasa'i 1699.