仁王般若經疏 1.117

1.117

「內空、外空、內外空、有為空、無為空、無始空、性空、第一義空、般若波羅蜜空、因空、佛果空、空空故空。」

"Internal emptiness, external emptiness, internal and external emptiness, conditioned emptiness, unconditioned emptiness, beginningless emptiness, nature emptiness, ultimate-truth emptiness, prajñāpāramitā emptiness, cause emptiness, Buddha-fruit emptiness, and emptiness because of the emptiness of emptiness."