ㄖㄨㄛˋruòㄧㄠˋyàoㄖㄣˊrénㄅㄨˋzhīㄔㄨˊchúㄈㄟfēiㄐㄧˇㄇㄛˋㄨㄟˊwéi

  1. 諺語)​比喻事情總會有人知道無法永遠隱瞞二十年目睹之怪現狀·第一》:旁邊人這邊四面印證起來便清清楚楚古語若要人不知,除非己莫為』,果然不錯!」

If you don't want anyone to know, don't do it (idiom)​. fig. If you do something bad, people will inevitably hear about it.