《后汉书·列传·袁绍刘表列传上》
建安元年，曹操迎接天子在许县定都，接着下诏书给袁绍，责备他土地广军队多而且一味给自己拉帮结派，没听说出兵援救天子但却擅自攻打他人。
建安元年，曹操迎天子都许，乃下诏书于绍，责以地广兵多而专自树党，不闻勤王之师而但擅相讨伐。
In the first year of Jian’an, Cao Cao escorted the Emperor to Xuchang and established his capital there. He then issued an edict to Yuan Shao, accusing him of monopolising the lands, enlarging his army, and attracting people to his cause. He had heard nothing about Yuan Shao sending troops to the Emperor’s aid, but had heard that he had been attacking other people.