Narrated Ubayy ibn Ka'b: The Messenger of Allah (ﷺ) used to observe witr with (reciting) "Glorify the name of thy Lord, the most High" (Surah 87), "Say O disbelievers" (Surah 109), and "Say, He is Allah, the One, Allah, the eternally besought of all

English translation · Sunan Abu Dawud