《资治通鉴·唐纪·唐纪十七》
丁亥，唐朝任命司列太常伯刘祥道兼任右相，大司宪窦德玄为司元太常伯、检校左相。
丁亥，以司列太常伯刘祥道兼右相，大司宪窦德玄为司元太常伯、检校左相。
On the day of Dinghai, the Tang Dynasty appointed Liu Xiangdao, the Minister of Ceremony and Worship, as the Right Chancellor and Dou Dexuan, the Prefect of the Censors, as the Minister of Ceremony and Worship and Acting Left Chancellor.