大比丘三千威儀 1.59

1.59

There are five matters regarding washing the pātra: first, one must use bath powder or soapberries; second, it must not be done on clean ground; third, one must not face toward the stūpa, the bhikṣusaṅgha, or the three masters; fourth, one must not splash or throw out the water; fifth, one must not wipe the inside or outside with a soiled towel. Each person should have a regular towel, and rubbing it dry by hand is good. When urgently needing to go out to an assembly, one should place it in the sun to dry, facing the heat.