'Widow' in the Bible

and if you don't oppress the alien, the orphan, and the widow, and don't shed an innocent person's blood in this place, and if you don't follow other gods to your own harm,

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.