Sahih Muslim 1027
صحيح مسلم#1027SahihJabir b. Samura reported:The Apostle of Allah (ﷺ) used to recite in the morning prayer" Qaf. By the Glorious Quran." and his prayer afterward shortened
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: 4:189