《贞观政要·卷三·论封建》
未能从望夷宫秦二世被弑事件中有所领悟：像夏朝后羿推翻太康、寒浞杀害后羿所带来的灾难，更是不堪回首；魏朝的高贵乡公遭遇的杀身之祸，与周幽王被申侯与缯勾结犬戎所杀那样悲惨的遭遇，是谁也不愿碰上的。
不悟望夷之衅，未堪羿、浞之灾；既罹高贵之殃，宁异申、缯之酷。
We failed to learn from the incident of Qin II being killed in the Wangyi Palace: disasters such as Xia Yi overthrowing Taikang and Han Zhu killing Yi are even more unbearable to look back on; Gao Gui Township of the Wei Dynasty was killed, and Zhou You. King’s tragic encounter with Shen Hou and Zeng hooking up with Quan Rong is something no one wants to encounter.