大般涅槃經義記 9.189

9.189

第二十一門有十方佛無十方佛。先辨諍相。有人聞說一國無有二佛俱出，便言一向無十方佛；有人宣說有十方佛。次辨道理，初非後是。文中初說一國無二，人聞起諍。後佛宣說有十方佛，不彰起諍，以當理故。

The twenty-first section concerns whether there are buddhas of the ten directions or no buddhas of the ten directions. First, the aspects of the dispute are distinguished: some, hearing it taught that two buddhas do not appear together in one realm, say that there are categorically no buddhas of the ten directions; others declare that there are buddhas of the ten directions. Next, the principle is analyzed: the former is incorrect, the latter is correct. In the text, it is first taught that in one realm there are not two [buddhas], and upon hearing this people raise disputes. Later, the Buddha declares that there are buddhas of the ten directions, and disputes are not manifested, because it accords with principle.