Sahih al-Bukhari 5390
صحيح البخاري#5390SahihNarrated Suwaid bin An-Nu`man:that while they were with the Prophet (ﷺ) at As-Sahba' which was at a distance of one day's journey from Khaibar the prayer became due, and the Prophet (ﷺ) asked the people for food but there was nothing with the people except Sawiq. He ate of it and we ate along with him, and then he asked for water and rinsed his mouth (with it), and then offered the (Maghrib) prayer and we too offered the prayer but the Prophet did not perform ablution (again after eating the Sawiq)
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: 70:18