《文心雕龙·谐讔》
还有秦代优旃谏阻二世在城墙上涂漆，楚国优孟谏阻庄王厚葬他的爱马：这些都是用曲曲折折加以修饰的话，来阻止昏君暴主的倒行逆施。
及优旃之讽漆城，优孟之谏葬马，并谲辞饰说，抑止昏暴。
There was also Youzan, a court jester of the Qin dynasty, who dissuaded the Second Emperor from painting the city walls, and You Meng, a court jester of the Chu State, who dissuaded King Zhuang from giving his favorite horse a grand burial. These examples used circuitous and roundabout language to prevent foolish rulers and cruel tyrants from doing harm.