《旧唐书·列传·卷十三》
高宗亲手写诏书说 ：我听说防止祸患要在它还没有出现之前，这是前代圣贤看重的事，皇宫里的规章，怎能随意变更呢？
手诏曰： 朕闻防祸未萌，先贤所重，宫阙之禁，其可渐欤？
Emperor Gaozong wrote the decree in his own hand, saying, "I have heard that the best time to get rid of a threat is before it has developed further. This is something that wise emperors of the past have attached great importance to. How could we change the palace rules casually?