四分律刪繁補闕行事鈔 1.227

1.227

四約界者。四種自然，羯磨法中，唯作結界一法，是僧執御；已外對首心念二法，及一二三人，眾中雜法，四人自恣，並得秉之。俱須盡集。二者作法攝僧界者，亦通二人，法通三種。就法界中，分為五位：一難事受戒小界，二因難事自恣，三數人說戒。此三小界，因難曲開；但作一法，後必閑豫，不開作之；故文中結已即解，非久住法也。四者戒場，本為數集惱僧，故開結之；唯除說戒、自恣、乞鉢、捨懺、亡人衣法、受日、解界、結衣界并解、結淨地、受功德衣等。五者大界，就中並有通塞，隨相可知。

Fourth, concerning the boundary: among the four kinds of natural boundaries, in the rites of karman, only the single rite of demarcating the boundary is conducted by the saṃgha; beyond this, the two rites of face-to-face and mental-intention, as well as the miscellaneous rites among the saṃgha for one, two, or three persons, and pravāraṇā for four persons, may all be performed. All must assemble fully. Second, regarding the ritual boundary that encloses the saṃgha: it also accommodates two persons, and the rites accommodate three kinds. Within the ritual boundary, it is divided into five ranks: first, the minor boundary for upasampadā in the event of adversity; second, pravāraṇā due to adversity; third, upoṣadha recitation by a few persons. These three minor boundaries are special allowances made due to adversity; they are only for performing a single rite, and if leisure later prevails, performing them is not allowed; hence the text says that as soon as they are demarcated they are dissolved, not being permanent rites. Fourth, the sīmā-platform: originally permitted to be demarcated because frequent assemblies annoyed the saṃgha; with the sole exceptions of upoṣadha recitation, pravāraṇā, begging for a bowl, forfeiture and confession, the rites for deceased persons' robes, receiving days of absence, dissolving a boundary, demarcating a robe boundary and dissolving it, demarcating pure ground, and receiving the merit robe (kaṭhina), etc. Fifth, the great boundary: within it, there are passages and obstructions, which may be understood according to their characteristics.