《资治通鉴·唐纪·唐纪十八》
许敬宗曾向皇帝奏请将他儿子许昂流放岭南，又曾将女儿嫁给蛮族首领冯盎的儿子，并多收取他的财物，所以袁思古的评议谈到了此事。
敬宗尝奏流其子昂于岭南，又以女嫁蛮酋冯盎之子，多纳其货，故思古议及之。
Xu Jingzong had once petitioned the emperor to exile his son Xu Ang to Lingnan, and had also married his daughter to Feng Ang, the son of a barbarian leader, and had received a lot of his money, so Yuan Sigu's comment touched on this matter.