《旧唐书·列传·卷一百二十》
御史中丞萧亻免与谏官们向皇帝上疏，陈述杨朝汶强暴蛮横的情况，裴度与崔群趁延英殿对答策问，也竭力禀陈其暴横。
御史中丞萧俛及谏官上疏陈其暴横之状，度与崔群因延英对，极言之。
Superintendent of Censors Xiao Ren, along with his fellow remonstrators, submitted a memorial to the emperor, stating that Yang Zhaowen was violent and oppressive. Pei Du and Cui Qun also took the opportunity at the Yan Ying Palace to report on his tyranny during the discussions.