The Prophet ﷺ said, "The disbeliever eats in seven intestines, while the believer eats in a single intestine."
عن النبي ﷺ قال: الكافر يأكل في سبعة أمعاء، والمؤمن يأكل في معى واحد.
Bukhari narrated it in the Book of Foods (5394) and Muslim in the Book of Drinks (2060), both through the route of Ubaydullah, from Nafi, from Ibn Umar, as mentioned above, and the wording is that of Muslim. In the wording of Bukhari it reads, "And indeed the disbeliever, or the hypocrite - I do not know which of the two Ubaydullah said - eats through seven [intestines]."