《资治通鉴·后晋纪·后晋纪六》
有关官员又想让出帝口衔璧、手牵羊，大臣拉着车上的棺材，到郊外迎接；先将这些仪式告诉契丹主，契丹主说： 我派奇兵直取大梁，不是来受降的。 
有司又欲使帝衔璧牵羊，大臣舆榇，迎于郊外，先具仪注白契丹主，契丹主曰： 吾遣奇兵直取大梁，非受降也。 
The relevant officials also wanted to have the emperor hold a piece of jade in his mouth and lead a sheep by the hand, with the ministers pulling the coffin on the carriage, to greet him in the suburbs; First inform the Lord of Khitan about these rituals, and he said: I sent a surprise soldier to capture Daliang directly, not to surrender.