Leviticus 25:47-50

47“ ‘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, 48they retain the right of redemption after they have sold themselves. One of their relatives may redeem them: 49An uncle or a cousin or any blood relative in their clan may redeem them. Or if they prosper, they may redeem themselves. 50They 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.