《水经注·卷一》
五龙降凡，天皇兄弟十二人，把五方分为十二部，仿效五龙的遗迹，施行无为的教化。天下的仙人圣人，治所在柱州昆仑山上。
五龙降天皇兄弟十二人，分五方为十二部，法五龙之迹，行无为之化，天下仙圣治。
The five dragons descended to the mortal world, the twelve brothers of the Emperor of Heaven divided the five directions into twelve departments, imitated the remains of the five dragons, and implemented the education of inaction. The immortals and saints in the world have been governed by the Zhou Shan Kunlun Mountain.