首楞嚴義疏注經 3.293

3.293

正破識界無體也。所因即法塵，法塵尚不可得，豈生汝識？能所俱無，立何為界？三、結示虛妄。

This directly refutes the realm of consciousness as having no substantial entity. That on which it depends is precisely the dharma-dust; since the dharma-dust is unobtainable, how could it produce your consciousness? Subject and object are both absent; what could be established as a realm? Third, concluding demonstration of falsehood.