Sahih al-Bukhari 5574
صحيح البخاري#5574SahihNarrated Salim:`Abdullah bin `Umar said, "Allah's Messenger (ﷺ) said, "Eat of the meat of sacrifices (of `Id al Adha) for three days." When `Abdullah departed from Mina, he used to eat (bread with) oil, lest he should eat of the meat of Hadi (which is regarded as unlawful after the three days of the `Id)
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 73:30