四分律刪繁補闕行事鈔 3.462

3.462

三沙彌尼法。大略與沙彌法同。若據行往法，式叉不與大尼為伴，以戒不滿故；自不得以沙彌尼為伴，以非同學故。若二尼兼一式叉，若二式叉兼一沙彌尼，得為伴。餘人不合。

Third, the rules for the śrāmaṇerī. In general, they are the same as the rules for the śrāmaṇera. If based on the rules of travel and movement: a śikṣamāṇā does not serve as a traveling companion to a full bhikṣuṇī, because her precepts are incomplete; nor may she take a śrāmaṇerī as a companion, because they are not fellow trainees. If two bhikṣuṇīs are accompanied by one śikṣamāṇā, or two śikṣamāṇās are accompanied by one śrāmaṇerī, they may serve as companions. Other combinations are not permissible.