Ephesians 6:5 - 6:8
5 Slaves, be obedient to those who are your masters according to the flesh, with fear and trembling, in the integrity of your heart, as to Christ; 6 not by way of eyeservice, as men-pleasers, but as slaves of Christ, doing the will of God from the heart, 7 serving with good will as to the Lord, and not to men, 8 knowing that whatever good thing each one does, this he will receive back from the Lord, whether slave or free.