四分律刪繁補闕行事鈔 3.236

3.236

六一揣食。謂數受益故，貪心則多；今總受內鉢中，斟量取足，更不受益。《解脫道論》：節量食，斷於貪恣，故取盡二十一揣等。如彼〈十二頭陀品〉中，廣有對治。《智論》：節量食者，隨所能食，三分留一，則身輕安隱，易消無患。如經中說，舍利弗云：我若食五口六口，足之以水，則足支身。於秦人食，可十口許。

Sixth, eating from a single portion: This means that because frequent additions increase greed, now one receives everything together into the bowl, estimating enough to be satisfied, and does not accept further additions. The Vimuttimagga states: "Regarding measured eating, to sever greedy indulgence, one takes up to twenty-one mouthfuls and so forth." As in that "Chapter on the Twelve Dhūtas," there are extensive antidotes. The Mahāprajñāpāramitopadeśa states: "Regarding measured eating: according to what one can eat, leave one-third aside; then the body will be light and secure, and it will be easy to digest without troubles. As stated in a sūtra, Śāriputra said: 'If I eat five or six mouthfuls and supplement it with water, it is enough to support my body.' For people of the Qin, it would be around ten mouthfuls."