俱舍論記 22.41

22.41

「謂樂等三受至得可意等名」者，答。謂樂等三受如其次第，由樂受力令順樂受相應、俱有等諸有漏行得可意名。由苦受力令順苦受相應、俱有等諸有漏行得不可意名。由捨受力令順捨受相應、俱有等諸有漏行得非可意非不可意名。

Regarding "It refers to the three feelings, pleasure and the rest... acquire the designation agreeable and the rest": this is the answer. It means that the three feelings of pleasure and the rest, in their respective order: by the power of pleasant feeling, the conditioned sāsrava phenomena that are concordant with pleasant feeling—conjoined, coexistent, and so forth—acquire the designation 'agreeable'. By the power of painful feeling, the conditioned sāsrava phenomena that are concordant with painful feeling—conjoined, coexistent, and so forth—acquire the designation 'disagreeable'. By the power of neutral feeling, the conditioned sāsrava phenomena that are concordant with neutral feeling—conjoined, coexistent, and so forth—acquire the designation 'neither agreeable nor disagreeable'.