四分律刪繁補闕行事鈔 1.258

1.258

二作法界者。由自然限約，未可遂心；設有大小，教文已定；用則不可，捨則非制；或作大法，地弱不勝。故如來曲順物情，聽隨處結；令楷式軌定，任情改轉；使成羯磨，弘濟大功；非此作法，餘不能辨。就中分三。

Second, the ritually demarcated boundary (kṛta-sīmā). Because the limitations of natural boundaries could not fulfill desires—even if large or small boundaries existed, the texts of the teaching had already fixed them; using them was inadmissible, yet abandoning them violated the regulations; or when performing a major rite, the site was too weak to sustain it—therefore the Tathāgata accommodated the sentiments of beings and permitted demarcating boundaries wherever appropriate. This established standard models and fixed regulations that could be altered according to circumstances, enabling the karman to be accomplished and broadly aiding the great task; other than these ritually created boundaries, no other means could accomplish it. Within this, there are three parts.