《宋史·列传·卷十七》
十一月，曹彬又派人晓谕他 ：事势已经如此，只可惜一城的百姓，如果你能归命，真是上策啊。 城即将攻克时，曹彬忽然称疾不处理事务，诸将都来探病。
十一月，彬又使人谕之曰： 事势如此，所惜者一城生聚，若能归命，策之上也。 城垂克，彬忽称疾不视事，诸将皆来问疾。
In November, Cao Bin sent someone to tell him clearly: "Things have come to this point, it is a pity that the people of this city. If you can surrender, it really is the best plan." When the city was about to be captured, Cao Bin suddenly claimed to be ill and did not handle any affairs. All the generals came to ask after his health.