俱舍論疏 6.202

6.202

論「唯說能生故至故不成難」，答也。經說無常能生色者，乃至能生識者皆無常，不說為識緣者皆無常也，故不成難。

[When] the treatise [states]: "Because it speaks only of what can produce ... therefore it does not constitute a valid objection," this is the reply: "The sūtra states that what can produce form, and so on up to what can produce consciousness, are all impermanent; it does not state that whatever serves as a condition for consciousness is impermanent. Therefore, it does not constitute an objection."