《新唐书·列传·卷九十四》
杜黄裳常利用空闲时向皇帝建议 ：陛下应该以贞元年间的弊病做鉴诫，整肃法律制度，削弱诸侯，天下就会太平。 
黄裳每从容具言： 陛下宜鉴贞元之弊，整法度，晙损诸侯，则天下治。 
Du Huangshang often used his spare time to suggest to the emperor: Your Majesty should take the disadvantages of the Zhenyuan era as a warning, rectify the legal system, and weaken the vassals, and the world will be peaceful.