《资治通鉴·唐纪·唐纪七十七》
史俨、李承嗣都是河东节度使李克用手下的勇猛战将，李克用对他们到杨行密那里很是惋惜，派遣使者从小道前去向杨行密请求放回史俨、李承嗣。
史俨、李承嗣皆河东骁将，李克用深惜之，遣使间道诣杨行密请之。
Shi Yan and Li Chengsi were both brave generals under Li Keyong, the Hedong Circuit Overseer. Li Keyong was distressed by their departure to Yang Xingmi and sent an envoy to Yang Xingmi via a minor road to request the return of Shi Yan and Li Chengsi.