五分比丘尼戒本 1.124

1.124

「若比丘尼，半月內浴，除因緣，波逸提。因緣者，病時、作時、行路時、風雨時、熱時，是名因緣。

"If a bhikṣuṇī bathes within half a month, except on appropriate occasions, it is a pāyattika. Appropriate occasions are: when ill, when working, when journeying, during wind and rain, [or] when it is hot; these are called appropriate occasions.