Sahih al-Bukhari 877
صحيح البخاري#877SahihNarrated `Abdullah bin `Umar:Allah's Messenger (ﷺ) said, "Anyone of you attending the Friday (prayers) should take a bath
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: 11:2