《资治通鉴·唐纪·唐纪九》
太宗开始到太极殿听政，对群臣说： 中书、门下省，都是机要的部门，诏敕文书有不当之处，均应议论提出意见。
上始御太极殿，谓侍臣曰： 中书、门下，机要之司，诏敕有不便者，皆应论执。
Taizong began presiding over state affairs in the Taiji Palace. He said to the officials: "The Zhongshu and Menxia Provinces are both crucial departments. You should discuss and present your opinions if there are any improprieties in imperial edicts and official documents."