nước sông không phạm nước giếng

== Vietnamese == === Etymology === Calque of Chinese 河水不犯井水 (hà thuỷ bất phạm tỉnh thuỷ). === Pronunciation === (Hà Nội) IPA(key): [nɨək̚˧˦ səwŋ͡m˧˧ xəwŋ͡m˧˧ faːm˧˨ʔ nɨək̚˧˦ ziəŋ˧˦] (Huế) IPA(key): [nɨək̚˦˧˥ ʂəwŋ͡m˧˧ kʰəwŋ͡m˧˧ faːm˨˩ʔ nɨək̚˦˧˥ jiəŋ˦˧˥] ~ [nɨək̚˦˧˥ səwŋ͡m˧˧ kʰəwŋ͡m˧˧ faːm˨˩ʔ nɨək̚˦˧˥ jiəŋ˦˧˥] (Saigon) IPA(key): [nɨək̚˦˥ ʂəwŋ͡m˧˧ kʰəwŋ͡m˧˧ faːm˨˩˨ nɨək̚˦˥ jiəŋ˦˥] ~ [nɨək̚˦˥ səwŋ͡m˧˧ kʰəwŋ͡m˧˧ faːm˨˩˨ nɨək̚˦˥ jiəŋ˦˥] === Phrase === nước sông không phạm nước giếng (idiomatic) people should keep to themselves and mind their own business