俱舍論頌疏論本 5.52

5.52

等流者，五類門也。此名身等同類因生，於五類中唯等流性。非業所感故，不通異熟。非色法故，不通長養。無記者，三性門也。唯是無覆無記性攝，謂名身等依聲而起，非是心力親能發起，故唯無記。聲是心力，親能發起，故通三性也。

'Outflow' is the category of the five classes [of dharmas]. These name-groups and so forth arise from homogeneous causes; among the five classes, they are exclusively of the nature of outflow (niṣyanda). Because they are not produced by karma, they do not extend to ripening (vipāka). Because they are not material dharmas, they do not extend to the nurtured (aupacayika). 'Indeterminate' is the category of the three natures: they are included exclusively in the unobscured-indeterminate nature. That is, name-groups and so forth arise dependent on sound and are not directly generated by mental force, so they are exclusively indeterminate. Sound is directly generated by mental force, and therefore extends to all three natures.