《水经注·卷十三》
泉水往东北流，与蛋尤泉汇合。蛋尤泉出自蛋尤城，东面没有城墙。
泉水东北流与蚩尤泉会，水出蚩尤城，城无东面。
The river flowed northeast and converged with Chiyou Spring. The Chiyou Spring originated in Chiyou City, which had no city walls on the east side.