Sahih al-Bukhari 1926
صحيح البخاري#1926SahihNarrated `Aisha and Um Salama:At times Allah's Messenger (ﷺ) used to get up in the morning in the state of Janaba after having sexual relations with his wives. He would then take a bath and fast
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: 30:34