四分律行事鈔資持記 2.1066

2.1066

釋初緣，正請中，初引二請，通皆有背。次明食體。五正列三，不存廢教。稠即濃厚，合上成四。下引《僧祇》，簡上稠粥。物雖一體，濃薄分異；取初出釜，不約凝漲。

Explaining the first condition, 'proper invitation': First, citing the two invitations, both universally involve turning one's back. Next, clarifying the substance of the food. Of the five proper foods, three are listed, not retaining obsolete teachings. 'Thick' means dense and rich, combining with the above to make four. Below, citing the Mahāsāṃghika-vinaya, it distinguishes this from the thick gruel above. Although the substance is the same, thin and thick are differentiated; it is taken as it first comes out of the cauldron, not defined by congealing and swelling.