Sunan Abi Dawud 1443
سنن أبي داود#1443HasanNarrated Abdullah ibn Abbas: The Messenger of Allah (ﷺ) recited the supplication (Qunut) daily for a month at the noon, afternoon, sunset, night and morning prayers. When he said: "Allah listens to him who praises Him" in the last rak'ah, invoking a curse on some clans of Banu Sulaym, Ri'l, Dhakwan and Usayyah, and those who were standing behind him said: Amen
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniHasan
Muhammad Muhyi Al-Din Abdul HamidHasan
Zubair Ali ZaiIsnaad Hasan
In-book reference: 8:28