大方廣佛華嚴經疏 13.17

13.17

第三「諸佛子」下，類通一切。初舉娑婆以類東方，後舉東方以類餘九。

Third, from "O Sons of the Buddha" onward, an analogical application across all [worlds]. First, the Sahā [world] is cited to analogize the eastern direction; later, the eastern direction is cited to analogize the remaining nine.