《汉书·传·傅常郑甘陈段传》
原宗正刘向上奏书说： 郅支单于监禁杀害使者和官兵数以百计，事情沸沸扬扬于外国，损失威望，失去了别人的敬重，各位大臣都为此忧愁。
故宗正刘向上疏曰： 郅支单于囚杀使者吏士以百数，事暴扬外国，伤威毁重，群臣皆闵焉。
Liu Xiang, former Chief of Ceremonies, submitted a memorial: Zhizhi Chanyu has imprisoned and killed hundreds of envoys and government officers, which has caused a great uproar in foreign countries, damaged our prestige, and lost the respect of others. All the ministers are worried about it.