《资治通鉴·后晋纪·后晋纪二》
后唐潞王李从珂素来与范延光友善，等到赵德钧败亡后，范延光从辽州领兵返归魏州，虽然他向晋高祖上表请降，内心很不自安，他写信暗中勾结秘琼，想同他一起作乱；秘琼接信后不作回答，范延光很怨恨他。
唐潞王素与延光善，及赵德钧败，延光自辽州引兵还魏州，虽奉表请降，内不自安，以书潜结秘琼，欲与之为乱。琼受其书不报，延光恨之。
Li Congke, the Prince of Lu of the Later Tang, had always been a friend of Fan Yanguang. After the demise of Zhao Dejun, Fan Yanguang led the troops back to Weizhou from Liaozhou. Although he submitted a memorial to the Emperor Gaozu of Jin, he felt very uneasy in his heart. He wrote a letter to secretly collude with Mi Qiong, thinking of joining him in rebellion. Mi Qiong did not respond after receiving the letter, so Fan Yanguang resented him very much.