Leviticus 25:54
And if he is not redeemed in these years, then he shall go out in the year of jubilee, both he and his children with him.
Exodus 21:2-3
If thou should buy a Hebrew slave, he shall serve six years; and in the seventh he shall go out free for nothing.
Leviticus 25:40-41
As a hired servant and as a sojourner, he shall be with thee and shall serve thee unto the year of jubilee.
Isaiah 49:9
that thou may say to the prisoners, Go forth; and unto those that are in darkness, Show yourselves. Upon the ways shall they be fed, and upon all the high places shall be their pastures.
Isaiah 49:25
But thus saith the LORD, Even the captives of the mighty shall be taken away, and the prey of the terrible shall be delivered: for I will contend with him that contends with thee, and I will save thy sons.
Isaiah 52:3
For thus saith the LORD, Ye have sold yourselves for nothing; and ye shall be redeemed without money.