《资治通鉴·唐纪·唐纪六十三》
等到傍晚的时候，刘公直仍未率兵来到，张巨只好引兵退走。他们开始登太行山，天已昏暗，又下起毛毛细雨，士卒自相惊扰，说： 追兵来了！ 
会日暮，公直等不至，巨引兵退，始登山，微雨晦黑，自相惊曰： 追兵近矣！ 
By dusk, Liu Gongzhi still hadn't arrived with his troops, so Zhang Ju had no choice but to withdraw. They began to climb the Taihang Mountains, but the sky had already grown dim, and a cold drizzle started falling; the soldiers stirred up a panic among themselves, shouting: "The pursuing troops are here!"