俱舍論頌疏論本 7.49

7.49

"Unimpeded is explained like [that of] the form [realm]": the unimpeded of the formless is explained like [that of] the form realm: it arises from three minds and can give rise to six minds. Arising from three minds means the three of its own realm. Being able to give rise to six minds means the three of its own realm, the defiled of the form realm, and in addition the two of the desire realm, the unwholesome and the impeded.