《隋书·列传·卷二十五》
这是丞相有大度的第一个长处。上士宋谦，奉命调查一些事，宋谦于是要调查陈万敌别的罪过。丞相责备他说： 上当入网的，自可推求，何必又去调查访问，有亏大礼！ 
臣谨案晋太康元年岁在庚子，晋武平吴，至今开皇六年，岁次丙午，合三百七载。
This is the first of the prime minister’s magnanimity. Shangshi Song Qian was ordered to investigate some matters, so Song Qian wanted to investigate Chen Wandi’s other crimes. The prime minister reprimanded him, saying: Those who have been caught in the trap can be traced back. Why do you have to investigate and visit again? It is a violation of etiquette!