佛說處處經 1.15

1.15

「佛袈裟裏，塵水不著、外垢不著，有二因緣：一者、不念一切人惡故；二者、見一切人有欲，欲令滅之。佛復浣袈裟者，外垢不著裏著，有身故有垢。所以者何？外行已盡，是故垢不著外，內行未盡，是故垢著，用有身故為內未盡，以有身為罪用，是故不惜身命。所以者何？復惜命，用命得道故。

"That dust and water do not cling to the inside of the Buddha's kāṣāya, nor does external filth cling to it, is due to two nidānas: first, because he does not dwell upon any person's evil; second, because seeing that all people have desires, he wishes to extinguish them. That the Buddha nevertheless washes his kāṣāya is because external filth does not cling to it, but internal filth clings, for where there is a body there is filth. Why is this? External practices have already been exhausted, so filth does not cling externally; internal practices are not yet exhausted, so filth clings to it. Because having a body means the internal is not yet exhausted, and because he takes having a body to be a fault, he does not begrudge his body or life. Why then does he nevertheless cherish his life? Because he uses life to attain the Way.