Sunan an-Nasa'i 1070
سنن النسائي#1070SahihIt was narrated that Anas bin Malik said:"The Messenger of Allah (ﷺ) prayed (saying the) Qunut after bowing for a month, supplicating against Ri'l, Dhakwan and 'Usayyah who had disobeyed Allah and His Messenger." (Sahih)
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 12:42