俱舍論記 6.80

6.80

「然唯得與至更無勝故」者，簡差別。釋唯等、勝為果等，與等、勝為因。非劣為因，加行生故。指法可知。

"Regarding 'Yet it only obtains with... since there is nothing superior':" this makes a distinction. It explains that only the equal and the superior serve as fruit, and so on, and it serves as a cause for the equal and the superior. It does not serve as a cause for the inferior, because it is produced by effort (prayoga). The indication of the dharmas can be known.