《资治通鉴·唐纪·唐纪二十四》
况且现在大唐宗室子弟所剩无几，陛下重登帝位时间也还不长，但竟然已有一个儿子因兴兵起事而被杀，另一个儿子因违背父命而流落远方，只剩下相王这么一个弟弟可以朝夕相处，讥刺汉文帝容不下淮南王的民谣，陛下不能不慎重考虑，《青蝇》诗中所阐发的道理，实在是值得陛下多加注意呀！ 
况国家枝叶无几，陛下登极未久，而一子以弄兵受诛，一子以愆违远窜，惟馀一弟朝夕左右，尺布斗粟之讥，不可不慎，《青蝇》之诗，良可畏也！ 
Moreover, there are few remaining descendants of the Tang royal family, and His Majesty has not been restored to the throne for long. However, one of his sons has been killed for raising an army, and another has been exiled for disobeying his father. His only brother left is King Xiang. The folk song that criticized Emperor Wen of the Han Dynasty for not tolerating the King of Huainan should be considered carefully by His Majesty. The道理, as revealed in the poem "Blue Flies", deserve His Majesty's attention!