Jami` at-Tirmidhi 471
جامع الترمذي#471SahihUmm Salamah narrated:"The Prophet would pray two Rak'ah after Al-Witr
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih
In-book reference: 3:19