俱舍論記 27.15

27.15

「如是四力至謂除滅智」者，如上所明四力所緣定、根、解、界，皆通苦、集、道諦所攝，故此四力皆九智性。不緣無為，故除滅智。

Regarding 'These four powers... up to: that is, excluding the knowledge of cessation,' as explained above, the objects of the four powers—absorptions, faculties, inclinations, and dispositions—are all subsumed under the truths of duḥkha, samudaya, and mārga. Therefore, these four powers all have nine knowledges as their nature. Since they do not take unconditioned dharmas (asaṃskṛta) as their object, the knowledge of cessation is excluded.