《宋史·本纪·卷三十》
五月初五，再次严禁各军派出承接文字使臣侦察朝政。
五月庚辰，申禁诸军差承接文字使臣伺察朝政。
On the 5th of May, the various armies were once again strictly forbidden from sending out emissaries assuming the responsibilities of a secretary to spy on the court politics.