Sahih al-Bukhari 5398
صحيح البخاري#5398SahihNarrated Abu Juhaifa:Allah's Messenger (ﷺ) said, "I do not take my meals while leaning (against something)
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: 70:26