《水经注·卷二十五》
卢川水又往东南流，注入桑泉水；桑泉水又往东南流，右边与蒙阴水汇合。
又东南注于桑泉水。桑泉水又东南，右合蒙阴水。
Lu Chuan water flows southeast again and flows into Sangquan water; Sangquan water flows southeast again and merges with Mengyin water on the right.