俱舍論記 15.155

15.155

「五現前順受至受於樂受」者，謂於現在正現行受現前不違，名現前順受。如契經言：受樂受時顯受現在，餘二受便滅。乃至廣說。經言受樂受時者，非此樂受現在前時，有餘受能受此樂受。但據樂受自體現前，經中即說受樂受。

Regarding 'Fifth, conforming to feeling in the present, up to feels a pleasant feeling': it means that not opposing the feeling that is currently manifesting in the present is called conforming to feeling in the present. As the sūtra says: 'When one feels a pleasant feeling' shows that the feeling is present, and the other two feelings cease. And so forth extensively. When the sūtra says 'when feeling a pleasant feeling', it is not that when this pleasant feeling is present, there is another feeling that can feel this pleasant feeling. It is simply based on the intrinsic nature of the pleasant feeling being present that the sūtra says 'feels a pleasant feeling'.