首楞嚴義疏注經 8.161

8.161

「如是乃至十方虛空滿足微塵，一一塵中現十方界，現塵、現界不相留礙，名無著行。」

"In this manner, even as empty space throughout the ten directions is filled with fine dust particles, in each and every dust particle he manifests the realms of the ten directions; manifesting the dust and manifesting the realms do not obstruct one another; this is called the practice of non-attachment."