坐禪三昧經 2.79

2.79

觸因緣受。云何受？三種受：樂受、苦受、不苦不樂受。云何樂受？愛使。云何苦受？恚使。云何不苦不樂受？癡使。復次樂受生樂，住樂滅苦；苦受生苦，住苦滅樂；不苦不樂受，不知苦不知樂。

Contact conditions feeling. What is feeling? Three kinds of feeling: pleasant feeling, painful feeling, and neither-painful-nor-pleasant feeling. What is pleasant feeling? It is the latent tendency of craving. What is painful feeling? It is the latent tendency of aversion. What is neither-painful-nor-pleasant feeling? It is the latent tendency of ignorance. Furthermore, pleasant feeling brings pleasure on arising, pleasure while abiding, and suffering upon cessation; painful feeling brings suffering on arising, suffering while abiding, and pleasure upon cessation; neither-painful-nor-pleasant feeling is not aware of suffering and not aware of pleasure.