Proverbs 31:8 in the King James Version
Open thy mouth for the dumb in the cause of all such as are appointed to destruction.
Context
7 Let him drink, and forget his poverty, and remember his misery no more.
8 Open your mouth for the mute, in the cause of all who are left desolate.
9 Open your mouth, judge righteously, and serve justice to the poor and needy.”