四分律行事鈔資持記 1.258

1.258

顯正中，初二句立義宗。若下，釋定不定兩相。可知。有別界者，或是作法，或約自然；水陸相侵，則隨遠近故也。

In revealing the correct [view]: the first two lines establish the doctrinal principle. From "if" onwards, explaining the two marks of fixed and unfixed, which can be known. "Having another boundary" is either enacted or natural; when water and land encroach upon each other, it then follows proximity and distance.