Servants: Slaves or Bond: when Israelites not to be Treated with Rigour
Source: TTT
Leviticus 25:39, 40, 46
If a countryman among you becomes destitute and sells himself to you, then you must not force him into slave labor. / Let him stay with you as a hired worker or temporary resident; he is to work for you until the Year of Jubilee. / You may leave them to your sons after you to inherit as property; you can make them slaves for life. But as for your brothers, the Israelites, no man may rule harshly over his brother.