冤有头，债有主 [ yuān yǒu tóu，zhài yǒu zhǔ ]
基本释义
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
when settling disputes one should not involve third parties; for every grievance someone is responsible, for every debt there is a debtor (idiom)