《宋史·列传·卷二百三十三》
丁大全统领淮西时，总领郑羽是吴门首富，丁大全想与他联姻，郑羽不答应。
大全知淮西，总领郑羽富甲吴门，始欲结，羽不从。
When Ding Daquan was in charge of Huai-Xi, Zheng Yu, the head of the Zheng family, was the richest man in Wumen. Ding Daquan wanted to marry his daughter to Zheng Yu, but Zheng Yu refused.