《国语·周语·富辰谏襄王以狄伐郑及》
暴露内怨而让外人得利，是不义；疏远亲族而和狄人来往，是不祥；以怨报德，是不仁。
章怨外利不义，弃亲即狄不祥，以怨报德不仁。
To expose internal conflicts and let outsiders profit from them is unjust; to alienate one's family and associate with the Di people is inauspicious; to return resentment for favors is inhumane.