四分律行事鈔資持記 3.1117

3.1117

五皆，上二句示廣。通指諸律，更兼眾論；條流之繁，則可知矣。難反，言其不可窮也。下二句顯要。即下七門也。

In the fifth part: the upper two lines show its breadth. Broadly referring to the various vinayas and further encompassing the various treatises, the complexity of the branches and streams can thus be known. 'Difficult to exhaust' means they cannot be completely investigated. The lower two lines reveal the essentials, which are the seven sections below.