《三国志·吴书·程黄韩蒋周陈董甘淩徐》
关羽号称有三万兵马，他亲自挑选五千精锐士兵，往河里投放物品堵住上游十多里的浅水地带，说打算夜里渡水过河。
羽号有三万人，自择选锐士五千人，投县上流十馀里浅濑，云欲夜涉渡。
Guan Yu claimed to have 30,000 troops, and he personally selected 5,000 elite soldiers, threw objects into the river to block the shallow water area more than ten miles upstream, and said that he planned to cross the river at night.