《资治通鉴·汉纪·汉纪三十六》
我们认为对他的话不可偏听，又因北单于年年进贡，想建立亲善关系，所以我们没有应许南单于的请求，目的是要成全北单于的忠孝之心。
惟念斯言不可独听，又以北单于比年贡献，欲修和亲，故拒而未许，将以成单于忠孝之义。
We believe his words are not to be entirely trusted. And because the Northern Chanyu offers tribute year after year, expressing his intention to establish friendly relations, we have not accepted the request of the Southern Chanyu, so as to fulfill the loyalty and filial piety of the Northern Chanyu.