Leviticus 25:54
If he cannot buy his freedom he and his children will be released in the year of jubilee.
Exodus 21:2-3
When you buy a Hebrew slave he will be your slave for six years. In the seventh year he may leave as a free man without paying for his freedom.
Leviticus 25:40-41
He will be like a hired worker or a visitor to you. He may work with you until the year of jubilee.
Isaiah 49:9
Say to those who are bound: Go forth, to those in the darkness and show yourselves. They will feed along the roads and their pasture is on all bare heights.
Isaiah 49:25
Certainly Jehovah says: The captives of the strong man will be taken away. The prey of the tyrant will be rescued. I will contend with the one who grapples with you and I will save your sons.
Isaiah 52:3
For this is what Jehovah says: You were sold for nothing, and without money you will be redeemed.