四分律行事鈔資持記 2.913

2.913

第四。（佛在舍衛，阿那律行寄婬女舍宿；彼裸身來嬈，故制。）

Fourth [pāyattika]. (When the Buddha was in Śrāvastī, Aniruddha lodged on his travels in the house of a courtesan; she came naked to molest him, hence it was prohibited.)