'Slaves' in the Bible

Slaves, obey your human masters with fear and trembling, in the sincerity of your heart as to Christ,

not like those who do their work only when someone is watching -- as people-pleasers -- but as slaves of Christ doing the will of God from the heart.

Masters, treat your slaves the same way, giving up the use of threats, because you know that both you and they have the same master in heaven, and there is no favoritism with him.