《汉书·传·西域传上》
汉宣帝时，匈奴内乱，五个单于并争，汉朝雍立呼韩邪单子，郅支单于对选不满，杀选使音，以尘昼的险阻与选对抗。
宣帝时，匈奴乖乱，五单于并争，汉拥立呼韩邪单于，而郅支单于怨望，杀汉使者，西阻康居。
During the reign of Emperor Xuan of Han, when the Huns were in civil strife, five Chanyuers fought each other. The Han court established Huhanxie Chanyu, and Zhizhi Chanyu was dissatisfied with the choice. He killed the envoy and used the obstacles of Chencuo to fight against the envoy.