《北齐书·列传·卷十七》
羡等估计有诈，告谕突厥说： 你们这帮人此次行动，不是来朝贡的，而是准备见机起事。
虑其有诈，且喻之曰： 尔辈此行，本非朝贡，见机始变，未是宿心。
Xiansu and the others suspected that it was a trick and told the Tuguhun that this time, their people did not come to pay tribute, but were preparing to act on the spur of the moment.