《资治通鉴·汉纪·汉纪五十八》
当初，曹操在谯县时，恐怕沿长江一带的郡县受到孙权的侵略，打算把百姓迁徙现内地，问扬州别驾蒋济对这个问题的看法，说： 从前，我与袁绍在官渡对峙时，曾迁徙过燕县与白马县的百姓，百姓没有走散，敌军也不敢抢掠。
初，曹操在谯，恐滨江郡县为孙权所略，欲徙令近内，以问扬州别驾蒋济，曰： 昔孤与袁本初对军官渡，徙燕、白马民，民不得走，贼亦不敢钞。
Initially, when Cao Cao was in Qiao County, he was afraid that the counties along the Yangtze River would be invaded by Sun Quan, so he planned to relocate the people to the inland and asked Jiang Ji, an assistant of Yangzhou, about the matter, saying: "When I was engaged in a stand-off with Yuan Shao at Guandu, I relocated the people of Yan County and Baima County, but these people did not disperse, and the enemy also did not dare to plunder."