《史记·七十列传·匈奴列传》
最初，匈奴喜欢汉朝的缯絮和食物，中行说说： 匈奴的人口总数，抵不上汉朝的一个郡，然而所以强大的原因，就在于衣食与汉人不同，不必依赖汉朝。
初，匈奴好汉缯絮食物，中行说曰： 匈奴人众不能当汉之一郡，然所以彊者，以衣食异，无仰於汉也。
In the beginning, the Xiongnu favored the silk and food of the Han Dynasty. Zhong Xing said, “The total population of the Xiongnu cannot equal the population of one commandery of the Han. However, the reason why they are so strong is because their clothing and food are different from the Han, so they are not reliant on the Han. 