《晋书·列传·第十六章》
因此戴着冕冠前有玉旒，用丝絮塞住耳朵表示不听信谗言，用意在于对恶人的惩罚必须取其中大的，然后简约但不疏漏，犯大罪的人必然受到诛杀，这样法禁就容易全备。
故冕而前旒，充纩塞耳，意在善恶之报必取其尤，然后简而不漏，大罪必诛，法禁易全也。
That's why there are jade strings in front of the emperor's crown and the ears are plugged with silk floss to show that flattery is not to be listened to. The purpose is to ensure that the punishment of the wicked must be decisive and then succinct but not incomplete. Those who commit serious crimes must be executed, and in this way the prohibitions of the law will be more comprehensive.