《新唐书·列传·卷一百四十九》
当即斩杀，另写信系在箭上射入城内，用之得到，当即烧掉。
即斩之。乃系书射城内，用之不发，即火之。
He ordered them to be executed and wrote a letter, which he attached to an arrow and shot into the city. Yongzhi received and immediately burned it.