《旧唐书·列传·卷十七》
贞观十一年，改封英国公，世袭蕲州刺史，当时世袭刺史都不到州郡就任，又以并州大都督府长史的官职遥领太子左卫率。
十一年，改封英国公，代袭蕲州刺史，时并不就国，复以本官遥领太子左卫率。
In the eleventh year of the Zhenguan era, his title was changed to Duke of England, and he inherited the Police Commissioner title of QiZhou. At that time, the inherited Police Commissioner was not to take office in the states or counties, and he was also given the official position of the Grand Director of Bingzhou to remotely lead the Prince's Left Wei Rate.