《水经注·卷十五》
休水又流经延寿城南，缎氏县的治所就在这里；也是古时的滑费，《春秋》里的滑国在这里建都。
休水又径延寿城南，缑氏县治，故滑费，《春秋》滑国所都也。
The Xiu River flows south of Yanshou City, where the county government of Duan is located; it is also the ancient Huafei, where the Hua Kingdom was built in the "Spring and Autumn" period.