《资治通鉴·后晋纪·后晋纪三》
当时，邺都留守、侍卫马步都指挥使刘知远在大梁入朝；泰宁节度使桑维翰知道安重荣已经心怀奸谋，又怕朝廷难违其意，秘密上疏说： 陛下免除了晋阳之难而领有天下，都是契丹的功绩啊，不可亏负他。
时鄴都留守、侍卫马步都指挥使刘知远在大梁；泰宁节度使桑维翰知重荣已蓄奸谋，又虑朝廷重违其意，密上疏曰： 陛下免于晋阳之难而有天下，皆契丹之功也，不可负之。
At that time, Liu Zhiyuan, governor of Yedu and commander-in-chief of the cavalry and infantry of the imperial guards, had just arrived in Daliang to join the court; Sang Weihan, governor of the military region of Taining, was aware that An Chongrong was harboring insidious intent and was also afraid that the imperial court would have difficulty opposing him, so he privately presented a memorial saying “The emperor first put down the rebellion in Jinyang and succeeded in taking over the empire, all this thanks to the merits of Khitan, you must not betray him.