《资治通鉴·后唐纪·后唐纪三》
看守城门的人对留守王正言说： 史彦琼半夜骑着马出了城，没有说他向哪里去。 
门者白留守王正言曰： 史武德夜半驰马出城，不言何往。 
The city gatekeeper said to the keeper Wang Zhengyan: Shi Yanqiong rode a horse out of the city at midnight, but he didn't say where he was going.