You shall not mistreat any widow or fatherless child.

Proverbs 14:31 ESV

Whoever oppresses a poor man insults his Maker, but he who is generous to the needy honors him.

Exodus 22:22 ESV 

You shall not mistreat any widow or fatherless child.

Proverbs 31:8-9 ESV 

Open your mouth for the mute, for the rights of all who are destitute. Open your mouth, judge righteously, defend the rights of the poor and needy.

Luke 18:1-8 ESV

And he told them a parable to the effect that they ought always to pray and not lose heart. He said, “In a certain city there was a judge who neither feared God nor respected man. And there was a widow in that city who kept coming to him and saying, ‘Give me justice against my adversary.’ For a while he refused, but afterward he said to himself, ‘Though I neither fear God nor respect man, yet because this widow keeps bothering me, I will give her justice, so that she will not beat me down by her continual coming.’” 

Isaiah 10:1-3 ESV 

Woe to those who decree iniquitous decrees, and the writers who keep writing oppression, to turn aside the needy from justice and to rob the poor of my people of their right, that widows may be their spoil, and that they may make the fatherless their prey! What will you do on the day of punishment, in the ruin that will come from afar? To whom will you flee for help, and where will you leave your wealth?

Deuteronomy 10:17 ESV 

For the Lord your God is God of gods and Lord of lords, the great, the mighty, and the awesome God, who is not partial and takes no bribe.

Genesis 50:19-20 ESV 

But Joseph said to them, “Do not fear, for am I in the place of God? As for you, you meant evil against me, but God meant it for good, to bring it about that many people should be kept alive, as they are today.

Isaiah 58:6 ESV 

“Is not this the fast that I choose: to loose the bonds of wickedness, to undo the straps of the yoke, to let the oppressed go free, and to break every yoke?

Ecclesiastes 3:16-17 ESV

Moreover, I saw under the sun that in the place of justice, even there was wickedness, and in the place of righteousness, even there was wickedness. I said in my heart, God will judge the righteous and the wicked, for there is a time for every matter and for every work.

Psalm 94:15-16 ESV 

For justice will return to the righteous, and all the upright in heart will follow it. Who rises up for me against the wicked? Who stands up for me against evildoers?