御注金剛般若波羅蜜經宣演 2.128

2.128

The Exposition says: Because the Buddha's dharmakāya's essence is tathatā, the Dharma is also like this—not separate from tathatā—hence it says "so it is." "Two" refers to words and meanings: because the Dharma preached cannot be seen with its own characteristics apart from the true dharmadhātu, it says "preaching the Dharma has no self-nature." Explaining the sūtra text, it says: if one says the Tathāgata has Dharma preached apart from tathatā, that is also an overestimation slander, failing to understand my meaning.