Leviticus 25:39-41

39“If one of your fellow Israelites falls into poverty and is forced to sell himself to you, do not treat him as a slave.

40Treat him instead as a hired worker or as a temporary resident who lives with you, and he will serve you only until the Year of Jubilee.

41At that time he and his children will no longer be obligated to you, and they will return to their clans and go back to the land originally allotted to their ancestors.