大方廣佛華嚴經疏 4.28

4.28

第九「智入」下，智身窮性相之源。相別曰諸，性皆空寂，性靜故寂，相無故空。

Ninth, from "wisdom enters" onward, [shows] the wisdom-body plumbing the source of nature and marks. The differentiation of marks is called "all [phenomena]"; their nature is completely empty and quiescent. Because the nature is still, it is quiescent; because marks are non-existent, it is empty.