《颜氏家训·慕贤篇》
从前虞国的宫之奇从小生长在虞君身边，虞君轻视他，不听他的劝谏，最终落了个亡国的结局，这样的简讯不能不留心啊！
所以鲁人谓孔子为东家丘，昔虞国宫之奇，少长于君，君狎之，不纳其谏，以至亡国，不可不留心也。
In the past, Yu's Palace Wonders grew up beside the King of Yu since childhood. The King of Yu looked down upon him and did not listen to his advice, which finally led to the亡国the. We cannot but pay attention to such a short message!