(35) باب كَيْفَ الْوِتْرُ بِوَاحِدَةٍ
It was narrated that Ibn Umar said:
"The Messenger of Allah (ﷺ) said: 'Prayer at night is two by two, and witr is one rak'ah.'" (ID)
Reference (ID): Sunan an-Nasa'i 1693 (ID)
In-book reference (ID): Book 20, Hadith 96 (ID)
English translation (ID): Vol. 2, Book 20, Hadith 1694 (ID)