四分律行事鈔資持記 2.1565

2.1565

九中。約罪則性強遮弱，約治則遮優性劣，故云互也。

In the ninth: In terms of offenses, natural offenses are strong and prescriptive offenses are weak; in terms of remedies, prescriptive ones are superior and natural ones are inferior; hence it says 'reciprocal'.