A few things the Bible says about Orphans...

Psalm 68:5-6a “A father to the fatherless, a defender of widows, is God in his holy dwelling. God sets the lonely in families…” (NIV)

Psalm 10:14, 17-18 “But you do see the trouble and grief they cause. You take note of it and punish them. The helpless put their trust in you. You are the defender of orphans LORD, you know the hopes of the helpless. Surely you will listen to their cries and comfort them. You will bring justice to the orphans and the oppressed, so people can no longer terrify them.”
Proverbs 23:10-11 “Don't steal the land of defenseless orphans by moving the ancient boundary markers, for their Redeemer is strong. He himself will bring their charges against you.”

Deuteronomy 10:17-19 “For the LORD your God is God of gods and Lord of lords, the great God, mighty and awesome, who shows no partiality and accepts no bribes. He defends the cause of the fatherless and the widow, and loves the alien, giving him food and clothing. He shows love to the foreigners living among you and gives them food and clothing. And you are to love those who are aliens for you yourselves were aliens in Egypt." (NIV)

Isaiah 1:16-17 “Wash yourselves and be clean! Let me no longer see your evil deeds. Give up your wicked ways. Learn to do good. Seek justice. Help the oppressed. Defend the orphan. Fight for the rights of widows.”

James 1:27 “Pure and lasting religion in the sight of God our Father means that we must care for orphans and widows in their troubles, and refuse to let the world corrupt us.”

Job 29:12-16 "Whoever heard me spoke well of me, and those who saw me commended me,
because I rescued the poor who cried for help, and the fatherless who had none to assist him.
The man who was dying blessed me; I made the widow's heart sing. I put on righteousness as my clothing; justice was my robe and my turban. I was eyes to the blind and feet to the lame. I was a father to the needy; I took up the case of the stranger."

Adopted Children of the Bible
Moses (Ex 2:10), Samuel (1 Samuel 2:1), Esther (Esther 2:7), Jesus (Matt 1)