四分律行事鈔資持記 2.697

2.697

合制中，初示合意。此下，勸持，初句示業道。律下，約制顯重。言三罪者，隨事成犯，單複不同；此據併犯，故言三也。

Under "Combined Formulation": first it indicates the intention of combining them. "This..." below encourages adherence; the first line indicates the path of action (karmapatha). "Vinaya..." below clarifies gravity based on the prohibition. Regarding "three offenses", offenses are constituted according to the actions, differing whether single or combined; this is based on committing them together, hence it says "three".