Sahih al-Bukhari 275
صحيح البخاري#275SahihNarrated Abu Huraira:Once the call (Iqama) for the prayer was announced and the rows were straightened. Allah's Messenger (ﷺ) came out; and when he stood up at his Musalla, he remembered that he was Junub. Then he ordered us to stay at our places and went to take a bath and then returned with water dropping from his head. He said, "Allahu-Akbar", and we all offered the prayer with him
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: 5:27