《水经注·卷二十四》
睢水又继续往东流经宁陵县老城南面，这里是从前的葛伯国，王莽时改名为康善。
睢水又东径宁陵县故城南。故葛伯国也，王莽改曰康善矣。
The Sui River continues to flow eastward through the south of the old city of Ningling County, which was the former Guo Guo. Wang Mang changed its name to Kangshan.