《旧五代史·后唐·末帝纪中》
有时臣等听说了些什么，关系到利害大事，难于形成文字，必须当面陈说，臣等也依旧例，在前一天请开延英殿。
或臣等有所听闻，切关利害，难形文字，须面敷扬，臣等亦依故事，前一日请开延英。
Sometimes, when we hear something related to major interests and it is difficult to form words, we must state it in person. We will also follow the example and ask to open Yan Ying Palace the day before.