四分律刪繁補闕行事鈔 1.256

1.256

初中，大論界法，總列三種：一攝衣界，如衣法中。二攝食界，如藥法中。三攝僧界，是此所明，就中分二。

In the first section, broadly discussing boundary rules, three kinds are listed in total: first, the boundary encompassing robes, as in the robe rules; second, the boundary encompassing food, as in the medicine rules; third, the boundary encompassing the saṃgha, which is what is explained here. Within this, there are two parts.