Sahih Muslim 1031
صحيح مسلم#1031SahihAbu Barza reported:The Messenger of Allah (ﷺ) used to recite in the morning prayer from sixty to one hundred verses
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: 4:193