俱舍論記 22.47

22.47

「有餘師釋至名行苦性」者，此釋三苦名。有餘師釋：苦即苦性，名苦苦性。壞即苦性，名壞苦性。行即苦性，名行苦性。皆據持業釋也。

Regarding "Other masters explain... is called the nature of the suffering of conditioned existence": this explains the names of the three sufferings. Other masters explain: Pain is itself the nature of suffering, hence named the nature of the suffering of pain. Change is itself the nature of suffering, hence named the nature of the suffering of change. Conditioned existence is itself the nature of suffering, hence named the nature of the suffering of conditioned existence. These are all explained according to karmadhāraya compounds.