Leviticus 25:54
And if he is not redeemed by these means, then he and his children with him shall be released in the year of jubilee.
Exodus 21:2-3
When you buy a Hebrew slave, he shall serve six years, and in the seventh he shall go out free, for nothing.
Leviticus 25:40-41
he shall be with you as a hired servant and as a sojourner. He shall serve with you until the year of the jubilee.
Isaiah 49:9
saying to the prisoners, 'Come out,' to those who are in darkness, 'Appear.' They shall feed along the ways; on all bare heights shall be their pasture;
Isaiah 49:25
For thus says the LORD: "Even the captives of the mighty shall be taken, and the prey of the tyrant be rescued, for I will contend with those who contend with you, and I will save your children.
Isaiah 52:3
For thus says the LORD: "You were sold for nothing, and you shall be redeemed without money."