(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. (ID)
Reference (ID): Sahih Muslim 2061 a (ID)
In-book reference (ID): Book 36, Hadith 249 (ID)
USC-MSA web (English) reference(deprecated numbering scheme): Book 23, Hadith 5116 (ID)