馬無夜草不肥,人無外快不富 [ㄇㄚˇ ㄨˊ ㄧㄝˋ ㄘㄠˇ ㄅㄨˋ ㄈㄟˊ , ㄖㄣˊ ㄨˊ ㄨㄞˋ ㄎㄨㄞˋ ㄅㄨˋ ㄈㄨˋ; ma3 wu2 ye4 cao3 bu4 fei2 , ren2 wu2 wai4 kuai4 bu4 fu4] a horse cannot get fat without an extra ration, a man cannot get rich without an extra income (idiom) ◄ ►