《汉书·传·王莽传下》
现在迎接须卜当安置到长安东街，不过一个匈奴人而已，不如让他留在匈奴有利。 
于今迎当置长安槁街，一胡人耳，不如在匈奴有益。 
Now to welcome Xu Bu Dang to be settled on the east street of Chang'an, (he is) just a Hun, but it is better for him to stay with the Huns.