Ephesians 6:5-8

Slaves, be obedient to those who are your earthly masters, with respect for authority, and with a sincere heart [seeking to please them], as [service] to Christ— not in the way of eye-service [working only when someone is watching you and only] to please men, but as slaves of Christ, doing the will of God from your heart; rendering service with goodwill, as to the Lord, and not [only] to men, knowing that whatever good thing each one does, he will receive this back from the Lord, whether [he is] slave or free.