Sunan Ibn Majah, Hadith 3257 ⓘ
It was narrated from Ibn ‘Umar that the Prophet said: “The disbeliever eats with seven intestines and the believer eats with one intestine.”
حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ نُمَيْرٍ، عَنْ عُبَيْدِ اللَّهِ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، عَنِ النَّبِيِّ ـ صلى الله عليه وسلم ـ قَالَ " الْكَافِرُ يَأْكُلُ فِي سَبْعَةِ أَمْعَاءٍ وَالْمُؤْمِنُ يَأْكُلُ فِي مِعًى وَاحِدٍ " .
also referenced under: Book 29, Hadith 3380 (In-Book) & Volume 4, Book 29, Hadith 3257 (DarusSalam)