Proverbs 31:8
"Open thy mouth for the dumb in the cause of all such as are appointed to destruction."
Cross References (ranked by relevance)
Nevertheless the hand of Ahikam the son of Shaphan was with Jeremiah, that they should not give him into the hand of the people to put him to death.
Let the sighing of the prisoner come before thee; according to the greatness of thy power preserve thou those that are appointed to die;
Doth our law judge any man, before it hear him, and know what he doeth?
And Jonathan answered Saul his father, and said unto him, Wherefore shall he be slain? what hath he done?
Wisdom is too high for a fool: he openeth not his mouth in the gate.