大比丘三千威儀 2.30

2.30

Washing and rinsing after a meal has five matters: first, one must not rub hands over the cup; second, one must not pick or probe inside the mouth with fingers; third, one must not blow one's nose or spit heavily into the pātra; fourth, when rinsing the mouth, one must not let rice be spat into the pātra; fifth, one must not vigorously shake one's hands, splashing and dirtying the persons to the left and right.