《水经注·卷二十四》
瓠读又往东流经垂亭北边，《春秋》：隐公八年前，宋公、卫侯在犬丘相会。
瓠渎又东径垂亭北。《春秋》隐公八年，宋公、卫侯遇于犬丘，《经》书垂也。
The Gourd River eventually flows eastward past the north of Chuiting. The Chunqiu states: eight years before the hidden Duke, the Duke of Song and the Marquis of Wei met at Quankiu.