《新五代史·列传·杂传第四十》
杜重威、李守贞进攻瀛州没有攻克，退到武强，听说契丹举国进犯，惊惶疑惑不知所措，而张彦泽恰好赶到，论说可以破虏军的情况，于是和杜重威等人往西奔赴镇州。
重威、守贞攻瀛州不克，退及武强，闻契丹空国入寇，惶惑不知所之，而彦泽适至，言虏可破之状，乃与重威等西趋镇州。
Du Zhongwei and Li Shouzhen attacked Yingzhou but failed to capture it. They retreated to Wuguiang. Hearing that the Khitans had invaded the whole country, they were panicked and bewildered, and Zhang Yanze happened to arrive, saying that it was possible to defeat the enemy army, so he went west with Du Zhongwei and others. Rush to Zhenzhou.