Sahih al-Bukhari 274
صحيح البخاري#274SahihNarrated Maimuna:Water was placed for the ablution of Allah's Messenger (ﷺ) after Janaba. He poured water with his right hand over his left twice or thrice and then washed his private parts and rubbed his hand on the earth or on a wall twice or thrice and then rinsed his mouth, washed his nose by putting water in it and then blowing it out and then washed his face and forearms and poured water over his head and washed his body. Then he shifted from that place and washed his feet. I brought a piece of cloth, but he did not take it and removed the traces of water from his body with his hand
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: 5:26