Don't make use of another's mouth unless it has been lent to you.Proverbs and old sayings Belgian about use
Have a mouth as sharp as a dagger, but a heart as soft as tofu.Proverbs and old sayings Indochinese about heart
Man who waits for roast duck to fly into mouth must wait very, very long time.Proverbs and old sayings Indochinese about time, man