Leviticus 25:34

31 and a house of the villages which have no wall round about, on the field of the country is reckoned; redemption is to it, and in the jubilee it goeth out.

32 `As to cities of the Levites -- houses of the cities of their possession -- redemption age-during is to the Levites;

33 as to him who redeemeth from the Levites, both the sale of a house and the city of his possession have gone out in the jubilee, for the houses of the cities of the Levites are their possession in the midst of the sons of Israel.

34 And a field, a suburb of their cities, is not sold; for a possession age-during it [is] to them.

35 `And when thy brother is become poor, and his hand hath failed with thee, then thou hast kept hold on him, sojourner and settler, and he hath lived with thee;

36 thou takest no usury from him, or increase; and thou hast been afraid of thy God; and thy brother hath lived with thee;

37 thy money thou givest not to him in usury, and for increase thou givest not thy food;