大方廣佛華嚴經疏 14.19

14.19

Second, relying on the support means that the earth element subsists and is established precisely because each lacks self-nature. If formerly they had an essence, then they would not rely on each other; not relying on each other, there could be no dharmas; therefore, gathering this absence of self-nature, those dharmas are constituted. The application to dharmas can be known.