《论衡·卷二十二·纪妖篇》
说蛇是白帝的儿子，高祖是赤帝的儿子，白帝的儿子为蛇，赤帝的儿子却为人。
谓蛇白帝子，高祖赤帝子；白帝子为蛇，赤帝子为人。
The snake is said to be the son of the White Emperor, the great ancestor is the son of the Red Emperor, the son of the White Emperor is a snake, but the son of the Red Emperor is a human.