俱舍論記 15.136

15.136

「有餘師說至異熟果故」者，釋第五、第六句。有餘師說不但上地有順捨業，下諸地中亦有第三順非二業，由中間定無尋唯伺業能招中定捨異熟故，以生中定唯有捨故。若異此者，中間定業應無異熟果或應無業，以無苦、樂所感果故。

Regarding "Other masters say ... retribution果故" (viṣayaphala), this explains the fifth and sixth lines. Other masters say that not only in the higher stages is there karma conducive to equanimity, but also in the lower stages there is the third [type], karma conducive to neither [pleasure nor pain], because karma without vitarka and with vicāra alone in the intermediate dhyāna is capable of bringing about the ripening of equanimity in the intermediate dhyāna, since rebirth in the intermediate dhyāna possesses only equanimity. If it were other than this, the karma of the intermediate dhyāna would have no fruitional result, or there would be no karma, because it would lack the results brought about by [karma conducive to] pain or pleasure.