宗四分比丘隨門要略行儀 1.6

1.6

僧中自恣法（要須下至五人已上方得作法。若少一人不成。差舉應差二人所差人必須具五德。不愛不恚不怖不癡。知已自恣等自恣。若有五人各別差。若六人雙差無失）。

Procedure for pravāraṇā within the Saṅgha: (It is necessary to have at least five persons or more before the ritual can be performed. If short of one person, it is not accomplished. In appointing the receiver of pravāraṇā, two persons should be appointed. The appointed persons must possess five virtues: free from partiality, free from anger, free from fear, free from delusion, and knowing who has made pravāraṇā and who has not made pravāraṇā. If there are five persons, each is appointed individually; if six persons, appointing them in pairs involves no fault.)