Leviticus 25:33-40

³³And if any one shall redeem a house of the Levites, then shall their sale of the houses of their possession go out in the release; because the houses of the cities of the Levites are their possession in the midst of the children of Israel.

³⁴And the lands set apart for their cities shall not be sold, because this is their perpetual possession.

³⁵And if your brother who is with you become poor, and he fail in resources with you, you shall help him as a stranger and a sojourner, and your brother shall live with you.

³⁶You shall not receive from him interest, nor increase: and you shall fear your God: I am the Lord: and your brother shall live with you.

³⁷You shall not lend your money to him at interest, and you shall not lend your meat to him to be returned with increase.

³⁸I am the Lord your God, who brought you out of the land of Egypt, to give you the land of Chanaan, so as to be your God.

³⁹And if your brother by you be lowered, and be sold to you, he shall not serve you with the servitude of a slave.

⁴⁰He shall be with you as a hireling or a sojourner, he shall work for you till the year of release: