俱舍論頌疏論本 2.45

2.45

'Eight unhindered are outflow and also of the nature of being born of maturation': the seven mental [elements] and the mental-object element (dharmadhātu), having no accumulation, are called the 'eight unhindered'. These have the nature of outflow and of being born of maturation. If they arise from causes of similar species and universal causes, they are called the nature of outflow; if they are brought forth from causes of maturation, they are called born of maturation. Because they are not accumulations, they are not nourished.