Sahih Bukhari Volume 7, Book 65, Hadith Number 307.

Narrated By ‘Amr : Abu Nahik was avaricious eater. Ibn ‘Umar said to him, “Allah’s Apostle said, “A Kafir (unbeliever) eats in seven intestines (eats much).” On that Abu Nahik said, “But I believe in Allah and His Apostle.”