《宋史·列传·卷七十一》
契丹见此情形一定产生怀疑，一定会认为我们有图谋收复燕南的意图，因此引用先发制人的办法，来制造祸端。
彼见形生疑，必谓我有图复燕南意，故引先发制人之说，造为衅端。
The Qidan must have doubts about this, and must think that we intend to recover the south of Yan. So they will use the method of striking first to create trouble.