Sahih Muslim 1159
صحيح مسلم#1159SahihAbu Sa'id al Khudri reported:I visited the Apostle (ﷺ) and saw him praying on a reed mat on which he was prostrating himself. And I saw him praying in a single garment with ends crossed with each other
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: 4:321