《水经注·卷三》
沃水又东流，汇合了一条水，这条水发源于县城东南六十里的山下，北方俗称灾豆浑水，往西北流，注入沃水。
其水又东合一水，水出县东南六十里山下，北俗谓之灾豆浑水。西北流，注于沃水。
The river Wo flows east again and merges with another river. The source of this river is in the mountains 60 miles southeast of the county town. The locals in the north call it Zaidouhun River. It flows northwest and joins the river Wo.