俱舍論疏 28.111

28.111

論「亦無心受樂至故無樂受」，此明無心受樂也。喜、樂二受名雖有異，同是其受。不可一心二受同起，既有喜受，如何有樂？

On the treatise passage: "Nor is there mental pleasurable feeling [...] hence there is no pleasurable feeling": this clarifies that there is no mental pleasurable feeling. Although the names of the two feelings of joy and pleasure differ, both are feelings alike. Two feelings cannot arise together in a single mind; since joy-feeling is present, how could there be pleasure?