來ㄌㄞˊlái者ㄓㄜˇzhě不ㄅㄨˋbù善ㄕㄢˋshàn，善ㄕㄢˋshàn者ㄓㄜˇzhě不ㄅㄨˋbù來ㄌㄞˊlái

  1. （諺語）​來的人不懷好意，懷有好意的不會來。如：「對頭來了，正所謂：『來者不善，善者不來。』我們還是快走吧！」

英He who comes is surely ill-intentioned, no-one well-meaning will come (idiom)​., Be careful not to trust foreigners., Beware of Greeks bearing gifts!