(13) باب الأَكْلِ مُتَّكِئًا
Narrated Abu Juhaifa:
Allah's Messenger (ﷺ) said, "I do not take my meals while leaning (against something).
Reference: Sahih al-Bukhari 5398
In-book reference: Book 70, Hadith 26
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 7, Book 65, Hadith 310