四分比丘戒本疏 2.84

2.84

第五十六、洗浴戒。文云「不得過」者，不得過佛所立禁制減半月洗也，非謂要令半月一洗不得過後也。此戒六開：一「熱時」者，律中取春四十五日并夏初一月，謂從三月一日至五月半合兩月半也。《多論》第八云「天竺熱早，故取此時。」如是隨處熱時早晚，數取二月半，於中洗浴無犯。二「病時」者，下至身嗅穢。三「作時」者，下至掃屋前地。四「風時」者，下至一旋風。五「雨時」者，一渧雨著身。六「遠行」者，半由旬也。

The fifty-sixth, the precept on bathing: The text says 'must not exceed', which means one must not exceed the prohibition established by the Buddha by bathing in less than half a month; it does not mean that one is required to bathe once every half-month and must not exceed that time afterwards. This precept has six exceptions: First, 'hot season', which in the Vinaya refers to forty-five days of spring together with the first month of summer, meaning from the first day of the third month to the middle of the fifth month, totaling two and a half months. The eighth fascicle of the *Sarvāstivāda-śāstra* says, 'India becomes hot early, therefore this period is taken.' Thus, depending on whether the hot season in a given place is early or late, one calculates two and a half months, during which bathing is without offence. Second, 'illness', down to the body smelling foul. Third, 'working', down to sweeping the ground in front of a house. Fourth, 'windy times', down to a single whirlwind. Fifth, 'rainy times', down to a single drop of rain touching the body. Sixth, 'traveling far', which is half a yojana.