《水经注·卷八》
水分为两条：右边一条往北，左边一条往西流经历城北面。西北有一片破塘，称为历水，与冻水汇合。
分为二水，右水北出，左水西径历城北，西北为陂，谓之历水，与泺水会。
The water is divided into two streams, one flowing northward on the right and one flowing westward on the left to the north of the city. In the northwest, there is a Potan called Lishui, which merges with Dongshui.