四部律并論要用抄 2.37

2.37

從非親里比丘尼取衣戒　云何名親里　十誦云。親里名母姊妹若女。乃至七世因緣。是名親里　僧祇云。非親里者非父親相續非母親相續　五分云。若無自心求自布薩。或知彼有長衣得取無犯。

The precept on taking a robe from an unrelated nun.
What is meant by a relative? The Daśādhyāya-vinaya states: A relative means a mother, sister, or daughter, up to seven generations of kinship; these are called relatives. The Mahāsāṃghika-vinaya states: An unrelated person is one who is not of the father’s lineage and not of the mother’s lineage. The Mahīśāsaka-vinaya states: If without seeking with one’s own mind, she herself makes poṣadha, or if one knows she possesses an extra robe, obtaining it entails no offense.