(5) باب الْقُنُوتِ فِي الْوِتْرِ
Muhammad reported on the authority of some of his teachers that Ubayy b. Ka'b led them in prayer during Ramadan. He used to recite the supplication (in the witr) during the second half of Ramadan.
Reference: Sunan Abi Dawud 1428
In-book reference: Book 8, Hadith 13
English translation: Book 8, Hadith 1423