俱舍論記 4.4

4.4

Regarding 'There are [phenomena that] definitely arise together [...] are not spoken of here': within the reply, [there are]: first, a general reply; second, a specific explanation. This is the general reply: there are necessarily conditioned formations (saṃskāra) that definitely arise together. Generally speaking, phenomena are briefly categorized into five classes. As for why the unconditioned (asaṃskṛta) is not mentioned: this chapter clarifies the functions of phenomena, and therefore it only explains the former four classes of phenomena. Among them, matter (rūpa) and mind (citta) have been extensively explained in the 'Dhātu-nirdeśa' and are not separately demonstrated again; only their co-arising is analyzed. Mental factors (caitasika) and non-associated [formations] (citta-viprayukta-saṃskāra) have not been discussed previously; this chapter explains them extensively and temporarily analyzes their co-arising.