《资治通鉴·唐纪·唐纪五十二》
侍御史窦群奏陈屯田员外郎刘禹锡居心邪恶，扰乱朝政，不应当留在朝中任职。
侍御史窦群奏屯田员外郎刘禹锡挟邪乱政，不宜在朝。
Supervising censor Dou Qun charged that Liu Yuxi, the junior member of the Bureau of Military Colonization, was corrupt, sowed discord in the imperial court, and should not be allowed to remain in office.