《资治通鉴·唐纪·唐纪二》
城池几次濒临陷落；恰好长平王李叔良带兵至泾州，薛仁果于是扬言粮食吃完了，带兵向南而去。乙卯，薛仁果又派高人假装以城池降唐。
城垂陷者数矣，会长平王叔良将士至泾州，仁果乃扬言食尽，引兵南去；乙卯，又遣高墌人伪以城降。
The city was almost captured several times. It happened that Li Shuliang, the King of Changping, led troops to Jingzhou. Xue Renguo then claimed that the food was gone and led his troops to the south. On the yi-mao day, Xue Renguo sent a skillful person to pretend to surrender the city to Tang.