Leviticus 25:31

But the houses of the villages, which have no walls round
about them
As there were many in the days of Joshua, the Scripture speaks of: the Jews suppose that such are meant, even though they were afterwards walled:

shall be counted as the fields of the country;
and subject to the same law as they:

they may be redeemed;
at any time before the year of jubilee, and if not, then

they shall go out in the jubilee;
to the original owners of them, freely, as Jarchi says, without paying anything for them.