Leviticus 25:49

46 And ye shall take them as an inheritance for your children after you, to inherit [them for] a possession, they shall be your bond-men for ever: but over your brethren the children of Israel, ye shall not rule one over another with rigor.

47 And if a sojourner or a stranger shall become rich by thee, and thy brother [that dwelleth] by him shall become poor, and sell himself to the stranger [or] sojourner by thee, or to the stock of the stranger's family:

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

49 Either his uncle, or his uncle's son may redeem him, or [any] that is nigh of kin to him of his family, may redeem him; or if he is able, he may redeem himself.

50 And he shall reckon with him that bought him, from the year that he was sold to him, to the year of jubilee: and the price of his sale shall be according to the number of years, according to the time of a hired servant shall it be with him.

51 If [there shall be] yet many years [behind], according to them he shall give again the price of his redemption out of the money that he was bought for.

52 And if there shall remain but few years to the year of jubilee, then he shall count with him, [and] according to his years shall he give him again the price of his redemption.