摩訶止觀 4.178

4.178

調食者，增病、增眠、增煩惱等食，則不應食也；安身愈疾之物，是所應食。略而言之，不飢不飽，是食調相。《尼揵經》曰：「噉食太過，體難迴動；窳惰懈怠，所食難消，失二世利；睡眠自受苦，迷悶難醒寤。」

Regulating food: food that increases illness, increases sleep, and increases defilements should not be eaten; substances that pacify the body and heal diseases are what should be eaten. Briefly speaking, being neither hungry nor overfilled is the characteristic of regulated eating. The Nirgrantha-sūtra says: "Eating to excess makes the body difficult to move; one becomes indolent, negligent, and lazy; the eaten food is difficult to digest, losing the benefits of two lifetimes; one experiences suffering from drowsiness, and in confused torpor it is difficult to awaken."