四分律刪補隨機羯磨 2.224

2.224

(The Buddha said: "If there are the eight perils and other circumstances, as in the case of upoṣadha, pravāraṇā is to be performed in an abbreviated form." However, face-to-face [pravāraṇā] has two forms of abbreviation, and [pravāraṇā by] simple jñapti already has three forms of abbreviation, as explained in the Xingshichao. If the perils permit a full recitation, one performs it fully, or recites it twice, or recites it once. If not, one should deal with it according to the Dharma.)