《资治通鉴·唐纪·唐纪六十四》
宰相请求唐武宗派遣使者宣慰招抚，但唐武宗决意要派军队讨伐。会昌六年
武宗至道昭肃孝皇帝下会昌六年
The Prime Minister asked Emperor Wuzong of Tang to send envoys to appease them and recruit them, but Emperor Wuzong of Tang was determined to send troops to attack them. During the sixth year of the Huichang reign.