四分律行事鈔資持記 1.1128

1.1128

遇緣去中。二難，即命梵為己緣，破和即為他緣。律中，本處因我住故破，他界因我往故和；為害事重，故並開之。諍見僧壞，西土多然；此方罕有，故云希也。

In [the section on] leaving upon encountering conditions: The two hardships—namely, [threats to] life and to the celibate life (brahmacarya)—are conditions pertaining to oneself; schism and harmony [in the Saṃgha] are conditions pertaining to others. In the Vinaya, if the original location would fall into schism because I stay, or another boundary would attain harmony because I go, because harm is a grave matter, exceptions are granted for both. Saṃgha disruption due to disputatious views mostly occurred in the Western land; it is rare in this region, which is why it is called "rare."