《旧唐书·本纪·卷四》
十三日，兼司列太常伯、检校沛王府长史、城阳县侯刘祥道兼右相，大司宪窦德玄兼司元太常伯、检校左相。
戊子，兼司列太常伯、检校沛王府长史、城阳县侯刘祥道兼右相，大司宪窦德玄兼司元太常伯、检校左相。
On the 13th, Liuxiangdao, who concurrently served as Taichangbo in Sichong, Chief Historian in Pei王府 and County Marquis in Chengyang County, was concurrently appointed as the Prime Minister, and Dou Dexuan, the Grand Master of the Great Prison, was concurrently appointed as Sichang Bo in Tai Changbo and Chief Historian in Zuo Xiang.