話到嘴邊留三分 [ㄏㄨㄚˋ ㄉㄠˋ ㄗㄨㄟˇ ㄅㄧㄢ ㄌㄧㄡˊ ㄙㄢ ㄈㄣ; hua4 dao4 zui3 bian1 liu2 san1 fen1] A still tongue makes a wise head. (idiom) ◄ ►