《资治通鉴·唐纪·唐纪五》
王世充登上洛阳城望见唐军行动，不知唐军意图，竟不敢出城交战。
王世充登城望见，莫之测也，竟不敢出。
Wang Shichong ascended the walls of Luoyang and watched the Tang army's actions, but did not know what the Tang army was planning and did not dare to leave the city to give battle.