'Widow' in the Bible

learn to do well; seek justice, relieve the oppressed, judge the fatherless, plead for the widow.

Thy princes are rebellious, and companions of thieves; every one loveth bribes, and followeth after rewards: they judge not the fatherless, neither doth the cause of the widow come unto them.

Now therefore hear this, thou that art given to pleasures, that sittest securely, that sayest in thy heart, I am, and there is none else besides me; I shall not sit as a widow, neither shall I know the loss of children: