Leviticus 25:47-53

“ ‘If a foreigner residing among you becomes rich and any of your fellow Israelites become poor and sell themselves to the foreigner or to a member of the foreigner’s clan, they retain the right of redemption after they have sold themselves. One of their relatives may redeem them: An uncle or a cousin or any blood relative in their clan may redeem them. Or if they prosper, they may redeem themselves. They and their buyer are to count the time from the year they sold themselves up to the Year of Jubilee. The price for their release is to be based on the rate paid to a hired worker for that number of years. If many years remain, they must pay for their redemption a larger share of the price paid for them. If only a few years remain until the Year of Jubilee, they are to compute that and pay for their redemption accordingly. They are to be treated as workers hired from year to year; you must see to it that those to whom they owe service do not rule over them ruthlessly.