Sahih Muslim 7186
صحيح مسلم#7186SahihAbu Huraira reported directly from Allah's Messenger (ﷺ) that he said:The distance of the two shoulders of the non-believer in Hell will be a three-day journey for a swift rider
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: 53:55