Sahih al-Bukhari 359
صحيح البخاري#359SahihNarrated Abu Huraira:The Prophet (ﷺ) said, "None of you should offer prayer in a single garment that does not cover the shoulders
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 8:11