《北史·列传·卷九》
明元帝传旨让长孙嵩以丰厚的礼物回赠。同时，命令他挑选精锐部队以备作战，如果刘裕的军队西去，便率领精兵南出彭城、沛郡；如果弄不清西行时间，就领兵在后面跟随。刘裕军队到达崤山、陕州一带，必定会跟姚泓军队对峙，结果必定是一方战败，另一方伤亡惨重，实力疲弊。
神瑞二年，秋谷不登，太史令王亮、苏坦因华阴公主等言： 谶书云：国家当都鄴，大乐五十年。 
Emperor Mingyuan decreed to let Changsun Song return the gift with thick presents. At the same time, he ordered him to select the elite troops to prepare for war. If the army of Liu Yu went west, he will lead the elite troops to go south to Pengcheng and Peixian. If he did not know when he was going west, he would take his troops to follow behind. When the army of Liu Yu reaches Xiaoshan and Shaanxi, it will surely battle against the army of Yao Hong, the result will definitely be one party losing and the other party suffering heavy casualties and the loss of military power.