佛制比丘六物圖 1.54

1.54

僧伽藍界一；（謂垣牆、籬棚，四面周匝，雖結界處，望不結攝衣，亦號「自然衣界」。）

1. The saṅghārāma boundary; (referring to walls and fences encircling the four sides; even if it is a place where a boundary has been ritually demarcated, in comparison to not performing the ritual for retaining robes, it is also called a "natural robe-boundary.")