Leviticus 25:33

And if a man purchase ^{H1350} of the Levites ^{H3881}, then the house ^{H1004} that was sold ^{H4465}, and the city ^{H5892} of his possession ^{H272}, shall go out ^{H3318} in the year of jubile ^{H3104}: for the houses ^{H1004} of the cities ^{H5892} of the Levites ^{H3881} are their possession ^{H272} among ^{H8432} the children ^{H1121} of Israel ^{H3478}.

If someone purchases a house from one of the L'vi'im, then the house he sold in the city where he owns property will still revert to him in the yovel; because the houses in the cities of the L'vi'im are their tribe's possession among the people of Isra'el.

So whatever belongs to the Levites may be redeemed—a house sold in a city they possess—and must be released in the Jubilee, because the houses in the cities of the Levites are their possession among the Israelites.

And if one of the Levites redeem, then the house that was sold, and the city of his possession, shall go out in the jubilee; for the houses of the cities of the Levites are their possession among the children of Israel.