《资治通鉴·唐纪·唐纪五十》
德宗让人告诉陆贽，说是 对于机要而重大的事情，不要当着赵憬的面陈述议论，应当将亲手所写的奏疏密封后上报朕闻知。 
上使人谕陆贽，以 要重之事，勿对赵憬陈论，当密封手疏以闻。 
Dezong told Lu Zhi that important and urgent matters should not be stated and discussed in front of Zhao Jing, but should be sealed and submitted to him after being written personally.