四分律行事鈔資持記 2.696

2.696

第五。（佛在舍衛，迦留陀夷與偷蘭難陀尼共坐相視，失不淨污安陀會，令尼洗，故制。）名中。戒制三事，以首者標名。

Fifth [precept]. (When the Buddha was in Śrāvastī, Udāyin sat together with the bhikṣuṇī Sthūlanandā looking at each other, emitted impurity and soiled his antarvāsaka, and had the bhikṣuṇī wash it, which led to the prohibition.) In the name: the precept prohibits three actions, and takes the first to label the name.