《资治通鉴·唐纪·唐纪二十八》
因此遇事经常表示不同意见，张说对此感到不快，便趁此机会将他外放为刺史。
由是遇事多所异同，说不悦，故因是出之。
Therefore, Cui Mian often expressed dissenting opinions on matters, which displeased Zhang Shuo, who seized this opportunity to send him out of the capital to serve as a provincial governor.