瑜伽論記 6.15

6.15

又處中國，不生邊地等者，泰法師云：唯中天竺名為中國，餘四天竺雖有四眾遊行往來竝名邊地，達須無有正音可譯，雖有識別是佷戾義，蔑戾車亦無音可譯，無所識別是頑嚚義。此後二處並無四眾遊行，亦無聖人居止，有識無識既有別故分為四處：一、中天竺三世諸佛生於此故名為中國；二、四天竺雖無佛出而有四眾往來化導；三、四天竺外佛在世時無佛四眾出世遊行然有識別如唐國等名達須國；四、夷狄戎羌名蔑戾車。

Regarding "moreover, residing in the central land, not being born in borderlands, and so forth": Master Tai says, "Only Central India is called the central land; the other four Indias, although the four assemblies travel back and forth within them, are all called borderlands. Dasyu has no exact equivalent in translation; although [they] possess discriminative awareness, it carries the sense of being obstinate and refractory. Mleccha also has no equivalent in translation; lacking discriminative awareness, it carries the sense of being dull and ignorant. In these latter two places, the four assemblies do not travel, nor do noble ones dwell. Since there is a distinction between having and lacking awareness, they are divided into four places: first, Central India, because the Buddhas of the three periods of time are born here, it is called the central land; second, the [other] four Indias, where although no Buddha appears, the four assemblies travel back and forth to transform and guide; third, regions outside the four Indias, where during the Buddha's lifetime no Buddha or four assemblies appeared to travel, yet [the people] possess discriminative awareness, such as the Tang lands and the like, which are called Dasyu lands; fourth, barbarian tribes such as the Yi, Di, Rong, and Qiang, which are called Mleccha."