《管子·匡君大匡》
桓公于是北伐令支国，打下凫之山，取孤竹国，拦阻山戎。看着管仲发问说： 还要做些什么？ 
桓公乃北伐令支，下凫之山，斩孤竹，遇山戎，顾问管仲曰： 将何行？ 
The Duke of Huan then led a northern campaign against the state of Lingzhi, defeated them at Fuyu Mountain, and captured the state of Guzhu, blocking the Shanrong tribes. Looking at Guan Zhong, he asked, “What should we do next?”