《淮南子·泰族训》
周公诛管叔、蔡叔，以安定国家、平息叛乱，可以称为忠臣，但是不能算是爱护兄弟。
周公诛管叔、蔡叔，以平国饵乱，可谓忠臣也，而未可谓弟也。
Zhou Gong executed Guan Shu and Cai Shu to stabilize the country and quell the rebellion. He can be called a loyal minister, but he cannot be considered to love his brothers.