大比丘三千威儀 1.13

1.13

十者，不知請歲羯磨。請歲者，求人出己之過，若見聞疑語我。若五人以上作百一羯磨，廣自恣要差二人。所以二人者，僧自恣竟自相向出罪，不得求餘人自恣，餘人僧不差故。二三四人三語自恣，一人心念口言。若不知是者，名不知請歲。

Tenth, not understanding the pravāraṇā karman. Pravāraṇā means asking others to point out one’s faults, saying: “Tell me if you have seen, heard, or suspected [any transgression].” If five or more persons perform the hundred-and-one karman, to carry out the broad pravāraṇā, two persons must be appointed. Why two persons? Because after the saṅgha completes pravāraṇā, they disclose offenses facing each other; they cannot request pravāraṇā from others, because the saṅgha did not appoint those others. For two, three, or four persons, pravāraṇā is done by speaking three times; for one person, it is done by mental reflection and verbal expression. If one does not know this, it is called not understanding pravāraṇā.