《资治通鉴·唐纪·唐纪五十四》
正赶上十五日夜晚，义武的军吏认为定州驻有外来的军队，请求禁止张灯，张茂昭说： 河东、河中、振武三镇兵马，都是官军，怎么能够把他们称作外来的军队呢！ 
会望夜，军吏以有外军，请罢张灯。张茂昭曰： 三镇，官军也，何谓外军！ 
He ordered lamps to be lit, did not prohibit people from traveling at night, and did not close the gates of the city. For three nights in a row, everything was the same as usual, and no one dared to shout or scream.