大乘義章 8.54

8.54

次就五趣分別八難。地獄、鬼、畜在下三趣，盲聾、世智、佛前佛後及欝單越，人趣少分。但就人中，盲聾、世智、佛前佛後，除欝單越，在餘三方。欝單唯在欝單越國。長壽一難，天趣少分，以欲界天非是難故（此三門竟）。

Next, distinguishing the eight difficulties according to the five destinies. Hell, ghosts, and animals are in the lower three destinies; blindness and deafness, worldly knowledge, before or after a Buddha, and Uttarakuru are a minor portion of the human destiny. Confining it to humans: blindness and deafness, worldly knowledge, and before or after a Buddha—excluding Uttarakuru—are in the other three continents. Uttarakuru is solely in the continent of Uttarakuru. The single difficulty of long life is a minor portion of the heavenly destiny, because the heavens of the desire realm are not difficulties. (This concludes the third gate.)