Sahih al-Bukhari, Book 70, Hadith 23 (In-Book) ⓘ
Narrated `Amr: Abu Nahik was avaricious eater. Ibn `Umar said to him, "Allah's Messenger said, "A Kafir (unbeliever) eats in seven intestines (eats much)." On that Abu Nahik said, "But I believe in Allah and His Apostle."
حَدَّثَنَا عَلِيُّ بْنُ عَبْدِ اللَّهِ، حَدَّثَنَا سُفْيَانُ، عَنْ عَمْرٍو، قَالَ كَانَ أَبُو نَهِيكٍ رَجُلاً أَكُولاً فَقَالَ لَهُ ابْنُ عُمَرَ إِنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " إِنَّ الْكَافِرَ يَأْكُلُ فِي سَبْعَةِ أَمْعَاءٍ " . فَقَالَ فَأَنَا أُومِنُ بِاللَّهِ وَرَسُولِهِ.
also referenced under: Hadith 5395 (DarusSalam) & Volume 7, Book 65, Hadith 307 (USC-MSA)