Leviticus 25:29-38

‘If a man sells a house in a walled city, then he may redeem it within a whole year after it is sold; within a full year he may redeem it. But if it is not redeemed within the space of a full year, then the house in the walled city shall belong permanently to him who bought it, throughout his generations. It shall not be released in the Jubilee. However the houses of villages which have no wall around them shall be counted as the fields of the country. They may be redeemed, and they shall be released in the Jubilee. Nevertheless the cities of the Levites, and the houses in the cities of their possession, the Levites may redeem at any time. And if a man purchases a house from the Levites, then the house that was sold in the city of his possession shall be released in the Jubilee; for the houses in the cities of the Levites are their possession among the children of Israel. But the field of the common-land of their cities may not be sold, for it is their perpetual possession. ‘If one of your brethren becomes poor, and falls into poverty among you, then you shall help him, like a stranger or a sojourner, that he may live with you. Take no usury or interest from him; but fear your God, that your brother may live with you. You shall not lend him your money for usury, nor lend him your food at a profit. I am the LORD your God, who brought you out of the land of Egypt, to give you the land of Canaan and to be your God.