《荀子·子道》
从前拥有万辆兵车的大国，只要有了四个敢于诤谏的大臣，那么疆界就不会被割削；拥有千辆兵车的小国，有了三个敢于诤谏的大臣，那么国家政权就不会危险；拥有百辆兵车的大夫之家，有了两个诤谏的大臣，那么宗庙就不会毁灭。
赐不识也！昔万乘之国，有争臣四人，则封疆不削；千乘之国，有争臣三人，则社稷不危；百乘之家，有争臣二人，则宗庙不毁。
In the past, a great country that owned ten thousand chariots would not be divided; a small country that owned one thousand chariots would not be in danger; a noble family that owned one hundred chariots would not be exterminated, as long as they had four, three, and two ministers, respectively, who dared to remonstrate.