The Messenger of Allah ﷺ said, "The disbeliever eats in seven intestines, while the believer eats in a single intestine."
وقال رسول الله ﷺ الكافر يأكل في سبعة أمعاء والمؤمن يأكل في معى واحد
A sahih hadith, narrated by Muslim, vol. 6, p. 132, from Abu Hurairah through a route other than the Sahifah. Bukhari narrated it in the Book of Foods from Sulayman bin Harb and from Ismail bin Abu Uways, with the wording, "The believer eats with one stomach, while the disbeliever eats with seven stomachs." Tirmidhi narrated it from Ishaq bin Musa, and Ibn Majah in the Book of Foods from Abu Bakr, and Malik in Muwatta, in the Book of Jami, from Suhayl bin Abu Salih and from Abu Zinad.