Sunan an-Nasa'i 1707
سنن النسائي#1707SahihAbu Bakr An-Nahshali narrated from Habib bin Abi Thabit, from Yahya bin Al-Jazzar, that Ibn 'Abbas said:"The Messenger of Allah (ﷺ) used to pray eight rak'ahs at night and pray witr with three, and pray two rak'ahs before Fajr
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih Lighairihi
Al-AlbaniSahih
Zubair Ali ZaiSahih
In-book reference: 20:110