Sahih al-Bukhari 953
صحيح البخاري#953SahihNarrated Anas bin Malik:Allah's Messenger (ﷺ) never proceeded (for the prayer) on the Day of `Id-ul-Fitr unless he had eaten some dates. Anas also narrated: The Prophet (ﷺ) used to eat odd number of dates
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: 13:5