'Slaves' in the Bible

Slaves, obey your earthly masters with fear, trembling, and sincerity, as when you obey the Messiah.

Do not do this only while you're being watched in order to please them, but be like slaves of the Messiah, who are determined to obey God's will.

Masters, treat your slaves the same way. Do not threaten them, for you know that both of you have the same Master in heaven, and there is no favoritism with him.