《旧唐书·列传·卷二十二》
当时太子学习五典三坟很用心，然而闲散下来，过度地游戏玩乐。李百药做《赞道赋》来劝告太子，然而太子最终还是因不醒悟而被废去。
因赐彩物五百段。然太子卒不悟而废。
At the time, the crown prince studied the Five Classics and Three Origins very diligently; however, when he had free time, he spent excessively playing and having fun. Li Baiyao wrote 〈Ode to the Way of Praise〉 to advise the Crown Prince, but the crown prince was ultimately deposed because of his failure to wake up.