Philo: The Special Laws, II

XXIV. (120) And concerning the tribe which was set apart as consecrated for the priesthood, the following laws are established. The law did not bestow upon the keepers of the temple any portion of the land, considering the first fruits of it a sufficient revenue for them. But it allotted them eight and forty cities to dwell in, and a suburb of two thousand cubits around each City.

(121) Therefore, it did not confirm the houses in these cities in the same manner that it did those in the other cities which are built within walls, to the purchasers, if those who had sold them were not able to redeem them within the year, but it permitted them to be redeemed at any time, like the open houses in the country taken from the gentiles, to which they corresponded. Since the Levites had received only houses in this district, of which the lawgiver did not think it fit that those who received them should be deprived any more than those to whom the allotments of the open houses in the country had fallen. And this is enough to say about the houses.