Jami` at-Tirmidhi 401
جامع الترمذي#401SahihAl-Bara bin Azib narrated:"The Prophet (S) would perform the Qunut in the Subh and Maghrib prayers
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
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiSahih - Bukhari And Muslim
In-book reference: 2:254