《山海经·海经·大荒西经》
在西北海以外，最荒远之地的角落，有一座山，断裂而合不拢，名叫不周山，有两头黄色的野兽守护着它。
西北海之外，大荒之隅，有山而不合，名曰不周负子，有两黄兽守之。
Outside the northwest sea, in the most desolate corner of the earth, there is a mountain that has been broken and can not close together. It is called Mount Bu Zhou and is guarded by two yellow beasts.