《水经注·卷二十八》
习郁根据范蠢的养鱼法，选了个大池塘，塘长六十步，宽四十步，池中筑了钓台。
郁依范蠡养鱼法，作大陂，陂长六十步，广四十步，池中起钓台。
According to Fan Chun's method of fish farming, Xi Yu selected a large pond, 60 steps long and 40 steps wide, and built a fishing platform in it.