《资治通鉴·唐纪·唐纪三》
丙子，王世充派遣他的将领郭士衡侵犯州，唐州刺史任大败郭士衡，郭士衡的部队被杀死、俘虏殆尽。
丙子，王世充遣其将郭士衡寇穀州，刺史任瑰大破之，俘斩且尽。
On Bingzi Day, Wang Shichong sent his general Guo Shiheng to invade Tangzhou. The prefect of Tangzhou, Ren, utterly defeated Guo Shiheng. Guo Shiheng's troops were either killed or captured.