《旧唐书·列传·卷九十三》
朝廷于是授刘怦幽州大都督府长史、兼御史大夫、幽州卢龙节度副大使、知节度事、管内营田观察、押奚契丹、经略卢龙军使。在位三月，于贞元元年九月去世，年五十九，停止上朝三日，追赠兵部尚书，赐给数量不一的布匹、绢帛。
总既以土地归国，授其弟约及男等一十一人，领郡符，加命服者五人，升朝班，佐宿卫者六人。
The imperial court then appointed Liu Peng as General of the Youzhou Grand Protectorate, Imperial Censor, Deputy Governor of the Youzhou Lulong Circuit, Governor-in-charge, and Overseer of Military Farms within his jurisdiction, and to manage Xi and Qidan affairs, and to plan the military affairs of the Lulong Circuit. He held this position for three months and died in the ninth month of the first year of Zhenyuan, at the age of fifty-nine. The imperial court suspended its activities for three days, and posthumously awarded him the title of Minister of War, and numerous bolts of cloth and silk.