四分律刪繁補闕行事鈔 2.207

2.207

與女人期同行戒三十。具犯同尼行戒。律緣以無學為教興，尚被打幾死，何況凡夫！故云，若村內一界行者，吉羅。不犯者：先不知若不共期，須往安隱，命梵緣者。

Precept thirty: traveling by appointment with a woman. The full transgression is identical to the precept on traveling with a bhikṣuṇī. The Vinaya's origin story arose from an aśaikṣa [arhat], who was nevertheless beaten nearly to death, how much more so an ordinary person! Therefore it says: if traveling within a single village boundary, it is a duṣkṛta. As for non-offenses: not knowing beforehand, or not making an appointment together, needing to go for peace and safety, or on grounds of danger to life or brahmacarya.