《资治通鉴·晋纪·晋纪三十四》
如果不这样的话，现在秃发利鹿孤在南方，军队强壮、国家富有，假若再把姑臧城兼并占有的话，那么，他的威霸之势便会越发强盛，而沮渠蒙逊和李没有力量抵抗他们，也一定会向他归附。一旦这样，那可就是秦的强大敌人了。 
不然，今秃发在南，兵强国富，若兼姑臧而据之，威势益盛，沮渠蒙逊、李暠不能抗也，必将归之，如此，则为国家之大敌矣。 
If not, then Tufa Lilugu is living in the south now, has a strong army and a rich country, and if he gains the city of Guzang, then his power will become even stronger, and Juqu Mengxun and Li Gao will not be strong enough to resist them, and they will definitely surrender to him. Once this happens, then he will become the most powerful enemy of Qin.