Slaves, obey your human masters with fear and trembling, in the sincerity of your heart, as to Christ.
References for Ephesians 6:5
Don't [work only] while being watched, in order to please men, but as slaves of Christ, do God's will from your heart.
References for Ephesians 6:6
Render service with a good attitude, as to the Lord and not to men,
knowing that whatever good each one does, slave or free, he will receive this back from the Lord.
References for Ephesians 6:8
And masters, treat them the same way, without threatening them, because you know that both their and your Master is in heaven, and there is no favoritism with Him.
References for Ephesians 6:9