《资治通鉴·唐纪·唐纪六十》
崔玄亮一边磕头，一边哭着说： 杀掉一个百姓都不能不慎重，何况宰相呢！ 
玄亮叩头流涕曰： 杀一匹夫，犹不可不重慎，况宰相乎！ 
Cui Xuanliang kowtowed while crying and said: Even killing a commoner cannot be done without caution, let alone a prime minister!