《资治通鉴·唐纪·唐纪五十六》
大家惊惶失措，准备逃走，李跳下马来，靠在胡床上，下达命令说： 有胆敢退却的，一概斩杀！ 
众惊，将走，愬下马据胡床，令曰： 敢退者斩！ 
Everyone panicked and wanted to flee, but Li dismounted his horse and sat on a bed, giving the order, "Whoever dares to retreat will be executed!"