《水经注·卷二十二》
城内还留有一座祠庙，名叫章乘。洧水又东流，称为洧渊水，《春秋传》说：龙在时门外的洧渊相斗，就是这个水潭。
城内有遗祠，名曰章乘是也，洧水又东，为洧渊水。《春秋传》曰：龙斗于时门之外洧渊，即此潭也。
There is still a temple in the city called Zhang Cheng. The Wei River flows eastwards again and is called the Wei Yuan River. According to the Chunqiu Commentary, dragons fought at Wei Yuan outside the Shimen Gate, which is this pool of water.