四分律行事鈔資持記 2.265

2.265

結指中。《善生》五種，統攝戒境；但舉境比法，故云譬耳，非譬喻也。雪，猶理也。

In the concluding reference: the five kinds in the Sujātā-sūtra comprehensively subsume the objects of the precepts; it merely adduces objects to compare them to dharmas, which is why it is called an analogy, not that it is a metaphorical illustration. "Snow" (xue) is like the principle [of purity].