仁王經疏 1.330

1.330

釋曰：第二、釋空所由。此明金剛菩薩得理盡三昧故，二種生死惑業皆空。所言惑者謂發業煩惱果者，即是惑所發業。如是惑業皆有生滅，總說為空。有果空者，惑業所生三者變易果空，因空故空者，重釋果空所以。由惑業因空故，果亦空也。

Commentary: Second, explaining the reason for emptiness. This clarifies that because Vajra Bodhisattva attains the samādhi of exhausting principles, the delusions and karma of both kinds of saṃsāra are all empty. What is called "delusion" refers to the afflictions that initiate karma; the "fruit" is the karma initiated by delusion. Such delusions and karma all have arising and ceasing, and are collectively stated to be empty. "Having fruits empty" means that the three kinds of transformative fruits produced by delusion and karma are empty. "Because causes are empty, [fruits] are empty" reiterates the reason why fruits are empty: because the causes of delusion and karma are empty, the fruits are also empty.