Sayyiduna Miqdam bin Ma'dikarib رضي الله عنه narrates that the Noble Prophet صلى الله عليه وآله وسلم said: The son of Adam has not filled any vessel worse than his stomach. It is sufficient for the son of Adam to eat a few morsels to keep his back straight. But if he must eat more, then let him fill one third of his stomach with food, one third with drink, and leave one third for breathing.