'Oppressor' in the Bible

This is what the LORD says, house of David: "Judge appropriately every morning, and deliver those who have been robbed from the oppressor, so my anger does not break out like fire and burn with no one to put it out because of your evil deeds.

This is what the LORD says: "Uphold justice and righteousness. Deliver from their oppressor those who have been robbed. Don't mistreat or do violence to the alien, the orphan, or the widow, or shed the blood of innocent people in this place.

Like a lion, he has left his den. Indeed, their land has become a waste because of the anger of the oppressor and because of the LORD's fierce anger."