《旧唐书·本纪·卷二》
二十三日，皇上下诏： 齐已故尚书仆射崔季舒、给事黄门侍郎郭遵、尚书右丞封孝琰等人，过去在邺中做官，名位显贵，心存忠诚正直，上表抗争极谏，设法挽救国家的危亡，却遭到像关龙逢一样的被囚禁杀害的酷刑。
丙午，诏： 齐故尚书仆射崔季舒、给事黄门侍郎郭遵、尚书右丞封孝琰等，昔仕鄴中，名位通显，志存忠谠，抗表极言，无救社稷之亡，遂见龙逢之酷。
The 23rd day, the emperor decreed: Cui Jishu, former Imperial Secretariat at Qi; Guo Zun, imperial attendant and deputy minister; and Feng Xiaoyan, Imperial Secretariat at the right. In the past, they had been officials in Ye, their names and positions were illustrious. Their hearts were loyal and upright, their memorials contained strong protests and earnest remonstrances. They sought ways to rescue the nation from peril, but suffered the cruel punishment of being imprisoned and killed, like Guan Longfeng.