僧羯磨 1.26

1.26

結戒場法（時諸比丘，有須四比丘眾、五比丘眾、十比丘眾、二十比丘眾羯磨事起，是中大眾集會疲極。佛言：「聽結戒場。稱四方界相，若安杙、若石、若疆畔若齊限。」是中結者，安三重相：最內一重是戒場相；中間一重是大界內相，此與戒場相不得相入及並，應留中間；最外一重是大界外相。先唱戒場相結，唱法如上。應如是作。）

The procedure for demarcating a sīmā-maṇḍala. (At that time, for the bhikṣus, matters of karman arose requiring an assembly of four bhikṣus, an assembly of five bhikṣus, an assembly of ten bhikṣus, or an assembly of twenty bhikṣus, and the great assembly became exhausted by gathering there. The Buddha said: "I allow you to demarcate a sīmā-maṇḍala. Announce the landmarks of the four directions, whether stakes are set up, or stones, or field boundaries, or fixed limits." In demarcating it within [the area], three rings of landmarks are set up: the innermost ring is the landmark of the sīmā-maṇḍala; the middle ring is the inner landmark of the mahāsīmā—this and the landmark of the sīmā-maṇḍala must not intersect or overlap, and an interval must be left between them; the outermost ring is the outer landmark of the mahāsīmā. First announce the landmark of the sīmā-maṇḍala and demarcate it, the method of announcement being as above. It should be performed thus.)