好事不出門,惡事傳千里 [ㄏㄠˇ ㄕˋ ㄅㄨˋ ㄔㄨ ㄇㄣˊ , ㄜˋ ㄕˋ ㄔㄨㄢˊ ㄑㄧㄢ ㄌㄧˇ; hao3 shi4 bu4 chu1 men2 , e4 shi4 chuan2 qian1 li3]
  lit. good deeds do not go beyond the door, evil deeds spread a thousand miles
  a good deed goes unnoticed, but scandal spreads fast (idiom)
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