俱舍論頌疏論本 28.63

28.63

死淨生一切，染生自下染者，前說淨、染相生，唯約定說。今據命終，故言死也。謂命終時，從生得淨，容生三界一切地染，隨生何地，生彼染故。若命終時，從染污能生自地及生下地。一切下染不生上者，未離下染，不生上故。

As for 'at death, the pure gives rise to all, while defiled gives rise to its own and lower defilements,' the previous explanation of the mutual generation of the pure and the defiled was stated solely with respect to concentration. Now it is based on the end of life, hence it says 'at death.' That is, at the time of death, from the innately acquired pure, defilement of all stages of the three realms can possibly arise, because wherever one is reborn, one gives rise to the defilement of that [plane]. If at the time of death it is from the defiled, it can give rise to its own stage and lower stages. All lower defilements do not give rise to higher ones, because without having abandoned lower defilements, one is not born above.