冤有头，债有主
yuān yǒu tóu，zhài yǒu zhǔ
基本释义
  1. 冤有冤头，债有债主。 比喻要了解事情，必须找为主的人。
出处
《续传灯录》:“卓拄一下，曰:‘冤有头，债有主。’”
英文翻译
  1. when settling disputes one should not involve third parties
  2. for every grievance someone is responsible, for every debt there is a debtor (idiom)