《新唐书·列传·卷一百三十八》
那时，留守、防御将、都亭驿史几十人，都曾暗中接受李师道所署之职，作为他的耳目。
于时，留守、防御将、都亭驿史数十人，皆阴受师道署职，使为讠冋察，故无知者。
At the time, there were dozens of governors, defence generals, and postmasters who had secretly accepted Li Shidao’s position and acted as his informants.