《资治通鉴·唐纪·唐纪二》
王世充军到洛水，李密的骑哨兵没有及时发现，临到要出击时，王世充的军队已经全部过了河。
世充军至，密候骑不时觉，比将出战，世充军悉已济矣。
Wang’s army got to the Luo River, and Li’s cavalry scouts failed to discover the enemy in time. By the time they were ready to engage, Wang’s army had already crossed the river.