Answer
James 1:27
Religion that is pure and undefiled before God, the Father, is this: to visit orphans and widows in their affliction, and to keep oneself unstained from the world.
Exodus 22:22-24
You shall not mistreat any widow or fatherless child. If you do mistreat them, and they cry out to me, I will surely hear their cry, and my wrath will burn, and I will kill you with the sword, and your wives shall become widows and your children fatherless.
John 14:18
I will not leave you as orphans; I will come to you.
Isaiah 1:17
Learn to do good; seek justice, correct oppression; bring justice to the fatherless, plead the widow's cause.
Psalm 68:5
Father of the fatherless and protector of widows is God in his holy habitation.
Psalm 27:10
For my father and my mother have forsaken me, but the Lord will take me in.
Psalm 82:3
Give justice to the weak and the fatherless; maintain the right of the afflicted and the destitute.
Job 29:12
Because I delivered the poor who cried for help, and the fatherless who had none to help him.
Psalm 146:9
The Lord watches over the sojourners; he upholds the widow and the fatherless, but the way of the wicked he brings to ruin.
Exodus 22:22
You shall not mistreat any widow or fatherless child.
Psalm 10:18
To do justice to the fatherless and the oppressed, so that man who is of the earth may strike terror no more.
Matthew 25:40
And the King will answer them, ‘Truly, I say to you, as you did it to one of the least of these my brothers, you did it to me.’
Jeremiah 22:3
Thus says the Lord: Do justice and righteousness, and deliver from the hand of the oppressor him who has been robbed. And do no wrong or violence to the resident alien, the fatherless, and the widow, nor shed innocent blood in this place.
Psalm 10:14
But you do see, for you note mischief and vexation, that you may take it into your hands; to you the helpless commits himself; you have been the helper of the fatherless.
Deuteronomy 14:28-29
At the end of every three years you shall bring out all the tithe of your produce in the same year and lay it up within your towns. And the Levite, because he has no portion or inheritance with you, and the sojourner, the fatherless, and the widow, who are within your towns, shall come and eat and be filled, that the Lord your God may bless you in all the work of your hands that you do.
Malachi 3:5
Then I will draw near to you for judgment. I will be a swift witness against the sorcerers, against the adulterers, against those who swear falsely, against those who oppress the hired worker in his wages, the widow and the fatherless, against those who thrust aside the sojourner, and do not fear me, says the Lord of hosts.
Deuteronomy 24:17-21
You shall not pervert the justice due to the sojourner or to the fatherless, or take a widow's garment in pledge, but you shall remember that you were a slave in Egypt and the Lord your God redeemed you from there; therefore I command you to do this. When you reap your harvest in your field and forget a sheaf in the field, you shall not go back to get it. It shall be for the sojourner, the fatherless, and the widow, that the Lord your God may bless you in all the work of your hands. When you beat your olive trees, you shall not go over them again. It shall be for the sojourner, the fatherless, and the widow. When you gather the grapes of your vineyard, you shall not strip it afterward. It shall be for the sojourner, the fatherless, and the widow.
Psalm 82:3-4
Give justice to the weak and the fatherless; maintain the right of the afflicted and the destitute. Rescue the weak and the needy; deliver them from the hand of the wicked.
Jeremiah 49:11
Leave your fatherless children; I will keep them alive; and let your widows trust in me.
Isaiah 1:23
Your princes are rebels and companions of thieves. Everyone loves a bribe and runs after gifts. They do not bring justice to the fatherless, and the widow's cause does not come to them.
Unless otherwise noted, all Bible verses are from The Holy Bible, English Standard Version® Copyright© 2001 by Crossway Bibles, a publishing ministry of Good News Publishers.
Special thanks to OpenBible.info for the data on the most well-known Bible verses.