Leviticus 25:54

And if he do not pay his ransom accordingly, he shall go out in the year of his release, he and his children with him.

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.

If he isn’t redeemed by these means, then he shall be released in the Year of Jubilee: he and his children with him.