Sunan Ibn Majah
Chapters on Food
كتاب الأطعمة
Chapter 62: The prohibition of eating while lying down prostrate
النَّهْىِ عَنِ الأَكْلِ، مُنْبَطِحًا
Translation
It wasnarrated from Salim that his father said
“The Messenger ofAllah(ﷺ) forbade a man from eating while lying down on his face.”