Sahih al-Bukhari 251
صحيح البخاري#251SahihNarrated Abu Salama:`Aisha's brother and I went to `Aisha and he asked her about the bath of the Prophet. She brought a pot containing about a Sa` of water and took a bath and poured it over her head and at that time there was a screen between her and us
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: 5:4