四分律刪繁補闕行事鈔 2.204

2.204

與尼期行戒二十七。五緣：一是尼，二言許共行，三無緣，四同一道，五度界，犯。律不犯者：不共期，若大伴行疑恐怖處，若往彼得安隱，命梵等不犯。《十誦》：開為尼負衣過險徑。

Precept twenty-seven: traveling by appointment with a bhikṣuṇī. There are five conditions: first, she is a bhikṣuṇī; second, verbally agreeing to travel together; third, without cause; fourth, on the same road; fifth, transgressing upon crossing a boundary. As for non-offenses in the Vinaya: not making an appointment together; traveling in a large caravan through places of suspicion and terror; if going there allows one to obtain peace and safety; or in cases of danger to life, brahmacarya, etc., there is no offense. The Daśādhyāya-vinaya allows carrying robes for a bhikṣuṇī through dangerous paths.