《资治通鉴·汉纪·汉纪六十》
曹洪和将领们商议，犹豫不决。骑都尉曹休说： 张飞等人若确实要切断我军后路，应该派军队隐蔽行军，而现在却先大造声势，而实际上做不到，这是很清楚的。
骑都尉曹休曰： 贼实断道者，当伏兵潜行；今乃先张声势，此其不能，明矣。
Cao Hong and the generals negotiated, hesitated. The prefect of Qiduwei, Cao Xiu, said: If Zhang Fei and others really want to cut off our army's retreat, they should send troops to march in secret, but now they are making a big fanfare, but they can't actually do it. This is very clear.