四分律刪繁補闕行事鈔 1.53

1.53

今立《四分》為本；若行事之時，必須用諸部者，不可不用。故《善見》云：毘尼有四法，諸大德有神通者，抄出令人知。一本者，謂一切律藏。二隨本。三法師語者，謂佛先說本，五百羅漢廣分別流通，即論主也。四意用，謂以意方便度用及三藏等廣說也。先觀根本，次及句義，後觀法師語；與文句等者用，不等者莫取（第六卷中廣明律師法）。正文如此。

Now, we establish the Dharmaguptaka Vinaya as primary. If, when conducting practical affairs, one must use other schools, it is not permissible not to use them. Therefore, the Samantapāsādikā says: "There are four rules in the Vinaya that great elders possessed of supernormal powers extracted to make known to people: First is the root, meaning all the Vinaya Piṭakas. Second is that which accords with the root. Third is the words of the Dharma masters, meaning that the Buddha first spoke the root, and the five hundred arhats broadly analyzed and propagated it; these are the treatise masters. Fourth is the application of intent, meaning using one's mind with skillful means to assess, apply, and broadly expound through the Tripiṭaka and so forth. First, observe the root; next, examine the phrasing and meaning; finally, observe the words of the Dharma masters. If they are equal with the text and phrasing, adopt them; if they are not equal, do not take them" (broadly explained in fascicle six under the standards for Vinaya masters). The authentic text is thus.