《宋史·列传·卷二百三十五》
赵拱与严实定约，带着严实的降表来到山阳，严实献出魏、博、恩、德、怀、卫、开、相九州来归附。
拱与定约，奉实款至山阳，举魏、博、恩、德、怀、卫、开、相九州来归。
Zhao Gong and Yan Shi made an agreement and took Yan Shi’s letter of surrender to Shanyang. Yan Shi offered to return Wei, Bo, En, De, Huai, Wei, Kai, and Xiang nine states.