瑜伽論記 21.321

21.321

第五釋差別門有二問答，第二問答中，此界非是苦故非所遍知，非是集故非所應斷，故不可滅，亦名為住。

Fifth, the section explaining the portal of distinction has two questions and answers. In the second question and answer: this realm is not suffering, so it is not what is to be thoroughly known; it is not origin, so it is not what ought to be abandoned; therefore it cannot be ceased, and it is also called 'abiding'.