Sahih Muslim 2630
صحيح مسلم#2630SahihAbu Darda' (Allah be pleased with him) reported:We set out during the month of Ramadan with the Messenger of Allah (ﷺ) in such an intense heat that one of us would place his hand over his head (in order to protect himself) against the excessive heat, and none among us was observing the fast, except the Messenger of Allah (ﷺ) and 'Abdullah b. Rawaha
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: 13:136