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). (Using translation from Bukhārī 5396)
قَالَ رَسُولُ اللهِ ﷺ الْمُسْلِمُ يَأْكُلُ فِي مِعًى وَاحِدٍ وَالْكَافِرُ يَأْكُلُ فِي سَبْعَةِ أَمْعَاءٍ