《资治通鉴·汉纪·汉纪五十五》
关羽把所有曹操赏赐的东西都封存起来，留下一封拜别的书信向曹操辞行，就到袁绍军投奔刘备。
羽尽封其所赐，拜书告辞，而奔刘备于袁军。
Guan Yu sealed up all the things Cao Cao had given him, left a farewell letter to Cao Cao, and went to Yuan Shao's army to join Liu Bei.