《资治通鉴·梁纪·梁纪十二》
在此以前，北魏孝武帝与丞相高欢产生隔阂之后，齐州刺史侯渊、兖州刺史樊子鹄、青州刺史东莱王元贵平，相互秘密地结成一派，共同观察形势的变化，侯渊也派遣使者到高欢住的地方进行联系。
初，魏孝武帝既与丞相欢有隙，齐州刺史侯渊、兗州刺史樊子鹄、青州刺史东莱王贵平阴相连结，以观时变；渊亦遣使通于欢所。
Before this, after the estrangement of Northern Wei's Xiao Wu Di and Chancellor Gao Huan, Hou Yuan, Inspector of Qi Prefecture, Fan Zigou, Inspector of Yan Prefecture, and Yuan Guiping, King of Donglai, Inspector of Qing Prefecture, secretly formed a clique and watched the changes in the situation together, Hou Yuan also sent envoys to Gao Huan's residence to contact him.