《旧唐书·列传·卷一百一十四》
李绛秘密奏请立即任命靠近泽潞四方的将帅一人，充任节度使，令其兼程赴镇，使刘从谏来不及抵拒诏命，新使已到，所谓 迅雷不及掩耳 。
绛密奏请速除近泽潞四面将帅一人，以充节度；令倍程赴镇，使从谏未及拒命，新使已到，所谓 疾雷不及掩耳 。
Li Jiang secretly submitted a memorial, asking the emperor to immediately appoint one of the military leaders near Zelu to serve as Jiedushi. He asked him to rush to the town to take office to prevent Liu Congjian from rejecting the imperial edict. By the time Liu Congjian got the news, the new envoy had already arrived. This was what the Chinese idiom "迅雷不及掩耳" (thunder is too quick to cover one's ears) means.