瑜伽論記 2.43

2.43

復次四無色地皆無多種功德故，二等有二萬劫壽，上三無色離下地染有少故倍倍增壽，謂識處已離下一無色地染招二萬劫壽，并本二萬為四萬劫，無所有處已離下二無色地染招四萬劫壽，并本二萬為六萬劫，非想處已離下三無色地染招六萬劫壽，并本二萬為八萬劫，除北俱盧洲餘一切處悉有中夭者，若小乘說云：一切三界皆有中夭，唯除欝單越、無想天最後身菩薩。今此文雖不說最後身菩薩無中夭事，理必應有。故下文云：非自害非他害者一切那落迦乃至住最後身菩薩，然位大乘，最後身菩薩多據化相非實後身。若據實者，初地已上即無中夭，何須遠說後菩薩無中夭耶？故知下文說，彼後身菩薩無中夭者，是權非實，故此不論。

Furthermore, because all four formless stages lack diverse qualities, the two equal ones have a lifespan of twenty thousand kalpas; the higher three formless [stages], being free from defilements of the lower stages, have a little, and thus their lifespans double and redouble. Namely, the sphere of consciousness, having abandoned the defilements of the one lower formless stage, incurs a lifespan of twenty thousand kalpas, which added to the original twenty thousand makes forty thousand kalpas; the sphere of nothingness, having abandoned the defilements of the lower two formless stages, incurs a lifespan of forty thousand kalpas, which added to the original twenty thousand makes sixty thousand kalpas; the sphere of neither-perception-nor-non-perception, having abandoned the defilements of the lower three formless stages, incurs a lifespan of sixty thousand kalpas, which added to the original twenty thousand makes eighty thousand kalpas. Regarding 'Except for Uttarakuru, all other places have untimely death': if according to the Hīnayāna, it is said that all three realms have untimely death, except only Uttarakuru, the Heaven of Non-conception, and bodhisattvas in their final body. Although this text does not mention the absence of untimely death for bodhisattvas in their final body, in principle it must certainly exist. Thus the lower text states: 'Neither harming themselves nor harmed by others are all those in the hells up to bodhisattvas abiding in their final body.' However, in the Mahāyāna, a bodhisattva in their final body is mostly spoken of in terms of an apparitional aspect, not an actual final body. If based on the actual, from the first stage onward there is no untimely death; why would one need to speak remotely of later bodhisattvas lacking untimely death? Therefore one knows that what the lower text says about those bodhisattvas in their final body lacking untimely death is provisional and not ultimate, and hence it is not discussed here.