Sahih Muslim 1915
صحيح مسلم#1915SahihIshaq is reported to have said on the authority of Aswad who quoted on the authority of 'Abdullah b. Mas'ud that the Messenger of Allah (ﷺ) used to recite these words as (fahal min muddakir)
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: 6:343