四分律刪繁補闕行事鈔 1.279

1.279

三明集僧與欲法者。初言集僧。必先盡自然界內。若標寬界狹者，盡標集之。《僧祇》云：避難界中，三由旬內有比丘者，並呼來，若出界已，作法結之。有師云：但盡自然而集。以標內地非自然界故，又未加法。若羯磨已，方有別眾。《僧祇》所明，彼為難緣，恐成障礙，故須集之。準理不然，並集為要，無正教可準。

Third, explaining the procedure for assembling the saṃgha and granting chanda: First, regarding assembling the saṃgha: One must first exhaustively include everyone within the natural boundary. If the marked area is wide while the [intended] boundary is narrow, one must assemble everyone within the entire marked area. The Mahāsāṃghika-vinaya states: In a sīmā [established to] avert danger, if there are bhikṣus within three yojanas, all must be summoned; if they have exited the sīmā, one may perform the karman to demarcate it. Some masters say: One need only assemble everyone throughout the natural [boundary]. This is because the ground within the markers is not [yet] a natural boundary, nor has the karman yet been applied. Only after the karman has been performed does a separate saṃgha come into being. What is explained in the Mahāsāṃghika-vinaya was for conditions of danger, fearing that an obstacle would be caused; thus they had to be assembled. In principle, this is not so: assembling all together is what is essential, though there is no authoritative teaching to follow.