Being Economical With Food And The Undesirability Of Eating One’s Fill

3349. Miqdam bin Madikarib said: “I heard the Messenger of Allah (peace be upon him) say: ‘A human being fills no worse vessel than his stomach, It is sufficient for a human being to eat a few mouthfuls to keep his spine straight. But if he must (fill it), then one third for food, one third for drink and one third for air.’” (Sahih)