《淮南子·汜论训》
古时候征讨别的国家，不杀小孩、不捉老人，这被认为是那时候的人道主义，而现在这样做就会被人嘲笑。
古之伐国，不杀黄口，不获二毛，于古为义，于今为笑。
In ancient times, when conquering other countries, children were not killed and old people were not captured, which was considered humanitarianism at that time, but now doing so would be ridiculed.