one good turn deserves another(one act of kindness should be paid back by another act of kindness) phrase [UK: wʌn ɡʊd tɜːn dɪ.ˈzɜːvz ə.ˈnʌð.ə(r)] [US: wʌn ˈɡʊd ˈtɝːn də.ˈzɝːvz ə.ˈnʌð.r̩]
善有善报,恶有恶报 /shànyǒushànbàophrase
what goes around comes around(actions have consequences) phrase [UK: ˈwɒt ɡəʊz ə.ˈraʊnd kʌmz ə.ˈraʊnd] [US: ˈhwʌt ɡoʊz ə.ˈraʊnd ˈkəmz ə.ˈraʊnd]