四分律比丘含注戒本 2.531

2.531

彼若過洗，遍身、半身皆墮；方便還悔，吉羅。不犯者，如上開緣數洗，若力勢強令洗者。

If he exceeds [the limit] in bathing, whether the whole body or half the body, it is in both cases a prāyaścittika; if he undertakes preparations and then desists, it is a duṣkṛta. There is no offence: if one bathes frequently according to the permissible circumstances above, or if someone forces him by superior strength to bathe.