《战国策·赵二·武灵王平昼闲居》
赵造也去劝谏赵武灵王，他说： 不竭尽忠心，知而不言，这是奸臣一样的行为；为了私利去欺骗君主，这是有损于国家的做法。
赵造谏曰： 隐忠不竭，奸之属也。以私诬国，贼之类也。
Zhao Zao also went and advised King Wuling of Zhao. He said: If you don't exhaust your loyalty and know but do not speak, that is the behavior of a traitor; to deceive the monarch for personal gain is to harm the country.