Sunan Ibn Majah 1174
سنن ابن ماجه#1174SahihIt was narrated that Ibn ‘Umar said:“The Messenger of Allah (ﷺ) used to pray (voluntary prayers) at night two by two, and he would pray one Rak’ah of Witr.”
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Fouad Abd al-BaqiSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih
In-book reference: 5:372