(8) باب فِي وَقْتِ الْوِتْرِ
Ibn 'Umar reported the Prophet (ﷺ) as suing:
Make the last of your prayer at night a witr.
Reference: Sunan Abi Dawud 1438
In-book reference: Book 8, Hadith 23
English translation: Book 8, Hadith 1433