《北齐书·列传·卷十七》
适逢丞相府佐封士让进密奏，奏称： 前时光西征回京，陛下敕令放散兵卒，光却令军卒进逼京师，欲行不轨，事情没有成功就停止了。
会丞相府佐封士让密启云： 光前西讨还，敕令放兵散，光令军逼帝京，将行不轨，事不果而止。
It so happened that Chengxiangfu Deputy Sajianjin Feng Shirang submitted a secret memorial, reporting: “Previously, after returning from the western expedition, Your Majesty ordered the generals and soldiers to be dispersed, but Guang instead had the soldiers advance on the capital, and wanted to commit sedition, but before he could succeed the matter came to a halt.”