《晋书·志·第二章》
它若环绕排列，其形如钩似已，其光亮芒角动摇不定，色泽变化，忽前忽后，忽左忽右，它所造成的灾难更严重。
环绕钩已，芒角动摇，变色，乍前乍后，乍左乍右，其为殃愈甚。
If it is arranged in a circle, its shape is like a hook or a worm, its light is bright and its corners move unsteadily, its color changes, it goes from front to back and from left to right, and the disasters it causes are more serious.