兔子不吃窩邊草 tu zi bu chi wo bian caoㄊㄨˋ ㄗˇ ㄅㄨˋ ㄔ ㄨㄛ ㄅㄧㄢ ㄘㄠˇ A hare doesn't eat the grass near its own hole. A villain doesn't harm his nextdoor neighbors.
