四分律行事鈔資持記 2.147

2.147

五中。引律者，此說戒法中，釋戒序文。戒是因，木叉是果；今召戒為木叉，即是因從果也。

In the fifth: Citing the Vinaya refers to the text explaining the precept preface in the ritual of poṣadha. The precept is the cause and *mokṣa* is the fruit; now calling the precept *mokṣa* is naming the cause from the fruit.