《旧唐书·本纪·卷九》
十五日，加平原太守颜真卿为户部侍郎，奖励他守城。
乙巳，加平原太守颜真卿户部侍郎，奖守城也。
On the 15th day, Yan Zhenqing, the governor of Pingyuan, was promoted to the rank of Minister of Household, rewarding him for defending the city.