《史记·七十列传·韩长孺列传》
现在单于听到了消息，没有到达马邑城就回去了，我那三万人的部队抵不过他，只会招致耻辱。
今单于闻，不至而还，臣以三万人众不敌，礻是取辱耳。
"Now that the Chanyu has heard the news and has returned without reaching Mayi City, my 30,000-strong force is no match for him and will only bring disgrace."