Sahih al-Bukhari 1509
صحيح البخاري#1509SahihNarrated Ibn `Umar:The Prophet (ﷺ) ordered the people to pay Zakat-ul-Fitr before going to the `Id prayer
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: 24:109