《资治通鉴·周纪·周纪二》
后来经过厉公、躁公、简公及出子在位时期的动荡不安，内忧外患丛生，很长一段时间都无暇过问对外的事务。
会往者厉、躁、简公、出子之不宁，国家内忧，未遑外事。
Later, after the reigns of the violent and restless Duke Li, Duke Zhao, Duke Jian, and Duke Chuzi, internal and external troubles abounded, and for a long time we had no time to deal with external affairs.