仁王護國般若波羅蜜多經疏 2.409

2.409

解曰：法境界者，即前蘊等所作諸行法受二中，三性六趣及以三寶，皆名為法，標俱空故。從此第二釋境界空。於中分三：且初第一明三性空。

The commentary explains: 'The objective realm of phenomena' refers to the aforementioned aggregates and so forth, as well as the conditioned actions performed; between the two of phenomena and feeling, the three natures, the six destinies, and even the Three Jewels are all called 'phenomena', and it indicates that all are empty. From here, the second part explains that the objective realm is empty. In this, there are three parts; first, the first clarifies the emptiness of the three natures.