《国语·晋语·里克杀奚齐而秦立惠公》
所以我们打算杀悼奚齐而拥立逃亡在外的公子为君，是为了安定民心消除忧患，并且可以指望得到诸侯的援助。也许可以说，诸侯认为合乎义的就抚助他，百姓喜欢的就尊奉他，国家才能安定巩固。
是故将杀奚齐而立公子之在外者，以定民弭忧，于诸侯且为援，庶几曰诸侯义而抚之，百姓欣而奉之，国可以固。
This is why we prepared to kill Dao Xi Qi ,  and establish a ruling monarch who had fled as the monarch, in order to pacify the people and eliminate the concerns and moreover to hope for support from the feudal lords.  It could be said that if the feudal lords believe he is just, they will assist him; if the common people like him, they will support him; and only then will the nation be stable and prosperous.