Sahih Muslim 5100
صحيح مسلم#5100SahihIbn 'Umar reported Allah's Apostle (ﷺ) having said:None of you should eat the flesh of his sacrificial animal beyond three days
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: 35:37