俱舍論記 15.156

15.156

「此中但說至順樂受等」者，上來雖復泛說五種，於此順三受業中但說第四異熟順受，由業能招受異熟故。雖業因與受果體性有殊，而得名為順樂受等。

Regarding 'Here we only speak of, up to conforming to pleasant feeling, etc.': although five kinds have been explained generally above, in this [context of] karma conforming to the three feelings, only the fourth, conforming to feeling by maturation, is discussed, because karma is able to incur maturation feeling. Although the intrinsic natures of the karmic cause and the feeling fruit are different, it nonetheless receives the name of 'conforming to pleasant feeling, etc.'