大方廣佛華嚴經疏 13.18

13.18

Fourth, from "Just as the Sahā [world]" onward, revealing host and companions without exhaustion. In the text, first this is cited to illustrate that, meaning that Sahā is the host, and worlds exhausting space such as "Secret Instruction" are all companions. Later, from "all of those" onward, that is used to analogize this, so that one knows that worlds exhausting space such as "Secret Instruction" are hosts, and their gathering of companions is likewise, thus becoming inexhaustible and inexhaustible. This is still spoken in terms of worlds of the same kind as Sahā, because in concluding the count, they are equally a hundred billion. As for other worlds of different kinds, such as those of tree shape, every single kind of them completely fills the dharmadhātu of space; this is manifold, inexhaustible and inexhaustible, not what is discussed here. All such are for the purpose of subduing sentient beings.