冤有頭，債有主 [－－头－债－－]

Jyutping jyun1 jau5 tau4 ， zaai3 jau5 zyu2
Pinyin yuān yǒu tóu ， zhài yǒu zhǔ

Definitions (Wiktionary)
  1. proverb
    reprisal for a wrong should be directed at the perpetrator

冤有頭，債有主 [－－头－债－－]

Jyutping jyun1 jau5 tau4 ，zaai3 jau5 zyu2
Pinyin yuān yǒu tóu , zhài yǒu zhǔ

Definitions (CC-CEDICT)
  1. for every grievance someone is responsible, for every debt there is a debtor (idiom)
  2. when settling disputes one should not involve third parties
Definitions (CC-CANTO)
  1. an injustice has a start, a debt has a debtor, which means to understand a situation, one must find the ones who started it first