(34) باب الْمُؤْمِنُ يَأْكُلُ فِي مِعًى وَاحِدٍ وَالْكَافِرُ يَأْكُلُ فِي سَبْعَةِ أَمْعَاءٍ
Ibn 'Umar reported Allah's Messenger (ﷺ) as saying:
A believer eats in one intestine, whereas a non-believer eats in seven intestines. (IT)
Reference (IT): Sahih Muslim 2061 a (IT)
In-book reference (IT): Book 36, Hadith 249 (IT)
USC-MSA web (English) reference(deprecated numbering scheme): Book 23, Hadith 5116 (IT)