成唯識論演祕 2.677

2.677

若法內外皆有虛空，名遍名空，但法外有不名容遍，既能合法各有虛空，空隨能合體應非一。

If a dharma has space both internally and externally, it is called all-pervading and called space; if it exists only outside dharmas, it is not called accommodating and all-pervading. Since the dharmas that combine with it each have space, space, following those that combine with it, should not be single in substance.