Leviticus 25:47-49

47And if a stranger or sojourner with thee be waxen rich, and thy brother be waxen poor beside him, and sell himself unto the stranger or sojourner with thee, or to the stock of the stranger’s family:

48after that he is sold he may be redeemed; one of his brethren may redeem him:

49or his uncle, or his uncle’s son, may redeem him, or any that is nigh of kin unto him of his family may redeem him; or if he be waxen rich, he may redeem himself.