《资治通鉴·唐纪·唐纪十三》
无忌说： 太子仁义厚道，真正是守成的有文才的君主；太子皇储的位置至关重大，怎么可以多次更改呢？
无忌曰： 太子仁厚，真守文良主；储副至重，岂可数易？
Wouji said: The Crown Prince is benevolent and virtuous, and is truly a monarch with both civil and literary talents; the Crown Prince’s position as heir to the throne is of utmost importance, how can it be repeatedly changed?