《资治通鉴·汉纪·汉纪十》
起初，匈奴归降朝廷的人说： 月氏原来居住在敦煌和祁连山之间，是一个强国，匈奴冒顿单于攻破了它。
初，匈奴降者言： 月氏故居敦煌、祁连间，为强国，匈奴冒顿攻破之。
Initially, those who surrendered to the court from the Xiongnu said: The Yuezhi originally lived between Dunhuang and the Qilian Mountains, and was a strong nation, but they were defeated by Modun Chanyu of the Xiongnu.