(27) باب الأَمْرِ بِالْوِتْرِ
It was narrated that Ali, may Allah (SWT) be pleased with him, said:
"Witr is not essential like the obligatory prayers, but it is the sunnah of the Messenger of Allah (ﷺ)." (DE)
Reference (DE): Sunan an-Nasa'i 1676 (DE)
In-book reference (DE): Book 20, Hadith 79 (DE)
English translation (DE): Vol. 2, Book 20, Hadith 1677 (DE)