俱舍論疏 30.127

30.127

論「若異此者至自然從定出」，論主反難釋也。若後常似前，即無出定。

On the Śāstra's statement: "If it were otherwise [...] one would naturally emerge from meditative absorption": This is the author of the treatise's counter-objection explaining the point. If the subsequent were always similar to the prior, there would be no emergence from meditative absorption.