Sunan An-Nasa'i

It was narrated that Ubayy bin Ka'b said:""In the first rak'ah of witr, the Messenger of Allah (ﷺ) used to recite: ""GLorify the Name of your Lord, the Most High;"" in the second; ""Say: O you disbelievers!"" and in the third; ""Say: He is Allah, (the) One