Cross reference
Leviticus 25:53
53 And he will be with him as a servant working for payment year by year; his master is not to be cruel to him before your eyes.
Leviticus 25:43
43 Do not be a hard master to him, but have the fear of God before you.
Leviticus 25:46
46 And they will be your children's heritage after you, to keep as their property; they will be your servants for ever; but you may not be hard masters to your countrymen, the children of Israel.