Sahih al-Bukhari 281
صحيح البخاري#281SahihNarrated Maimuna:I screened the Prophet (ﷺ) while he was taking a bath of Janaba. He washed his hands, poured water from his right hand over his left and washed his private parts. Then he rubbed his hand over a wall or the earth, and performed ablution similar to that for the prayer but did not wash his feet. Then he poured water over his body, shifted from that place, and washed his feet
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: 5:33