Leviticus 25:39-41

39‘And if one of your brethren who dwells by you becomes poor, and sells himself to you, you shall not compel him to serve as a slave.

40As a hired servant and a sojourner he shall be with you, and shall serve you until the Year of Jubilee.

41And then he shall depart from you—he and his children with him—and shall return to his own family. He shall return to the possession of his fathers.