《资治通鉴·唐纪·唐纪二十二》
孙万荣打败王孝杰后，在柳城西北四百里处凭借险要地势筑城，留下老弱、妇女和所缴获的武器资财，派他的妹夫乙冤羽留守，自己领精兵侵扰幽州。
万荣之破王孝杰也，于柳城西北四百里依险筑城，留其老弱妇女、所获器仗资财，使妹夫乙冤羽守之，引精兵寇幽州。
After Sun Wanrong defeated Wang Xiaojie, he built a city 400 miles northwest of Liucheng based on the steep terrain, leaving behind the old, the weak, women, and the captured weapons and supplies, and sent his brother-in-law Yi Yuan to stay behind. He personally led his elite troops to harass Youzhou.