《逸周书·卷十·铨法解》
好像是忠言，败坏亲近者以取信于你；好像是与你同好，耍阴谋他代替了寇仇；好像与你同恶，顺随你的计谋分散你的思想，你的想法泄漏，事情就会失败，这就叫巧妙地害人：这三种人不得蓄养。
有如忠言竭，亲以为信；有如同好，以谋易寇；有如同恶，合计掬虑，虑泄事败；是谓好害，三不畜也。
Seem to be loyal, but ruin the close ones to win your trust; seem to be the same with you, but scheme in secret and replace the enemies; seem to be evil as you, follow your plot to disperse your thoughts, your thoughts will be leaked and things will be failed, this is called harming people cleverly: these three people shall not be fostered.