Sahih al-Bukhari 272
صحيح البخاري#272SahihNarrated Hisham bin `Urwa:(on the authority of his father) `Aisha said, "Whenever Allah's Messenger (ﷺ) took the bath of Janaba, he cleaned his hands and performed ablution like that for prayer and then took a bath and rubbed his hair, till he felt that the whole skin of the head had become wet, then he would pour water thrice and wash the rest of the body." `Aisha further said, "I and Allah's Messenger (ﷺ) used to take a bath from a single water container, from which we took water simultaneously
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: 5:25