諸經要集 20.60

20.60

“Before a stūpa, before the Saṅgha, and before one's upādhyāya or ācārya, one must not open the mouth to spit or blow nasal mucus loudly upon the ground. If one wishes to spit or blow mucus, do so in a secluded, screened place, not causing people to despise or look down upon one. This is the rule for mucus and saliva.”