Messenger of Allah ﷺ said, "A Muslim eats in one intestine (i.e. he is satisfied with a little food) while a Kafir (unbeliever) eats in seven intestines (eats much).
قَالَ رَسُولُ اللَّهِ ﷺ يَأْكُلُ الْمُسْلِمُ فِي مِعًى وَاحِدٍ وَالْكَافِرُ يَأْكُلُ فِي سَبْعَةِ أَمْعَاءٍ