Sahih Muslim 1544
صحيح مسلم#1544SahihAbu Salama b. 'Abd al-Rahman is reported to have said that he had heard Abu Huraira saying:I would say prayer along with you which is near to the prayer of the Messenger of Allah (ﷺ). and Abu Huraira recited Qunut in the noon and in the 'Isya' and in the morning prayer, and invoked blessing (of Allah) upon Muslims-and curse upon the unbelievers
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 5:377