Sahih Muslim 2531
صحيح مسلم#2531SahihThe son of Abu Bakra reported it on the authority of his father that the Messenger of Allah (ﷺ) had said:The two months of 'Id, Ramadan and Dhu'l-Hijja (are not incomplete)
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: 13:37