Sahih Muslim 3168
صحيح مسلم#3168SahihNafi' reported that Ibn 'Umar regarded halt at Muhassab as Sunnah (of the Holy Prophet) and observed the noon prayer on Yaum al-Nafr at that place. Nafi' said:Allah's Messenger (ﷺ) halted at Muhassab and the Caliphs did the same after him
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: 15:372