成唯識論述記 4.646

4.646

述曰：未見經部立四善所由，今以義逼令有四種。滅定之心何善所攝，此正彼計，心是相應善。若彼說言：此心是善，今難言：應無貪等善根相應；許相應善故；如餘位善心。

The Commentary states: We have not seen the Sautrāntika establish the rationale for the four kinds of wholesome; now, by forcing them through reasoned analysis, they are made to have four kinds. Under which kind of wholesome is the mind of the cessation attainment subsumed? This targets their actual assertion that the mind is wholesome by association (saṃprayukta-kuśala). If he says: "This mind is wholesome," we now object: It should be associated with wholesome roots like non-greed, because you accept that it is wholesome by association, like a wholesome mind in other states.