Leviticus 25:54
"And if he be not redeemed in these years, then he shall go out in the year of jubile, both he, and his children with him."
Cross References (ranked by relevance)
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 contendeth with thee, and I will save thy children.
Isaiah 49:9
That thou mayest say to the prisoners, Go forth; to them that are in darkness, Shew yourselves. They shall feed in the ways, and their pastures shall be in all high places.
Isaiah 52:3
For thus saith the LORD, Ye have sold yourselves for nought; and ye shall be redeemed without money.