《汉书·传·匈奴传上》
中行说说： 匈奴人的风俗是吃牲畜的肉，喝它的奶汁穿它的皮革；牲畜吃草喝水，随着季节转移地点。
中行说曰： 匈奴之俗，食畜肉，饮其汁，衣其皮；畜食草饮水，随时转移。
Zhongxing said: The Xiongnu people's custom is to eat the meat of livestock, drink its milk, and wear its leather; the livestock eat grass and drink water, and move around with the seasons.