《资治通鉴·汉纪·汉纪五十八》
开始时，关中联军的每一部将领率军来到，曹操都面有喜色，部下将领们询问缘故，曹操说： 关中地区辽阔广大，如果他们各自据险坚守，我们征讨他们，没有一两年平定不了。
诸将问其故，操曰： 关中长远，若贼各依险阻，征之，不一二年不可定也。
When the troops of the Guanzhong Allied Forces were first approaching, Cao Cao's face was filled with joy, and his subordinates asked him why, Cao Cao said: "The Guanzhong region is vast and expansive, if they were each defending their strongholds, it would take us more than a year or two to conquer them.