俱舍論疏 6.255

6.255

論「若依此言至涅槃常故」，經部徵也。若已有擇滅故名為不生，即應一切眾生苦本不生，以擇滅、涅槃是常法故。

On the Śāstra's statement, "If by 'based on this' it is meant… because nirvāṇa is eternal": This is the Sautrāntika's interrogation. If because one already possesses an analytically acquired cessation it is called non-arising, then suffering in all sentient beings would originally never arise, because analytically acquired cessation and nirvāṇa are eternal phenomena.