《资治通鉴·唐纪·唐纪五十六》
王承宗害怕，向田弘正乞怜，请求以两个儿子作为人质，并将德、棣二州献给朝廷，向朝廷交纳赋税，请朝廷任命官吏。
承宗惧，求哀于田弘正，请以二子为质，及献德、棣二州，输租税，请官史。
Wang Chengzong was afraid, begged Tian Hongzheng for mercy, and asked to send his two sons as hostages. He would offer De and Di states to the court and give the court tax, then asked the court to appoint officials.