四分律比丘含注戒本 2.766

2.766

If one first crosses the village gate, one commits a falling offense [prāyaścittika]. Stepping one foot inside, as well as the preliminary action and mutual agreement, are all duṣkṛta. The bhikṣuṇīs commit the same offense. As for non-offense: if one manages affairs of the saṃgha, a stūpa, or the sick, having informed a bhikṣu; if the road passes through the village and one makes an announcement; or in the event of an invitation, summons, or dangers to life or pure conduct, there is no offense.