《水经注·卷三十二》
韦昭说：云梦在华容县，按《春秋》，鲁昭公三年前，郑伯赴楚，子产准备了农具来耕耘江南的云梦。
韦昭曰：云梦在华容县。按《春秋》鲁昭公三年，郑伯如楚，子产备田具，以田江南之梦。
Wei Zhao said: Yunmeng is in Huarong County. According to the <Spring and Autumn Annals>, three years before Lu Zhaogong, when Zheng Bo went to Chu, Zichan prepared farm tools to cultivate the Yunmeng south of the Yangtze River.