Proverbs 31:8

Open thy mouth for the dumb - For such accused persons as have no counsellors, and cannot plead for themselves.

Are appointed to destruction - חלוף בני beney chaloph , variously translated, children of passage - indigent travelers; children of desolation - those who have no possessions, or orphans. I believe it either signifies those who are strangers, and are travelling from place to place, or those who are ready to perish in consequence of want or oppression.