Zechariah 7:10 Don't oppress the widow, nor the fatherless, the foreigner, nor the poor; and let none of you devise evil against his brother in your heart.' (See NIV)
Malachi 3:5 I will come near to you to judgment; and I will be a swift witness against the sorcerers, and against the adulterers, and against the perjurers, and against those who oppress the hireling in his wages, the widow, and the fatherless, and who deprive the foreigner of justice, and don't fear me," says Yahweh of Armies. (See NAS NIV)