俱舍論疏 28.206

28.206

論「於此四中至能生無漏」，述四分定中，唯順決擇分能生無漏，非餘三也。

The passage of the śāstra from 'Among these four...' down to '...is able to give rise to the untainted' explains that among the four parts of meditative attainment, only the part conducive to decisive penetration is able to give rise to the untainted, not the other three.