Ephesians 6:5-8

5Servants, be obedient unto them that according to the flesh are your masters, with fear and trembling, in singleness of your heart, as unto Christ;

6not in the way of eyeservice, as men-pleasers; but as servants of Christ, doing the will of God from the heart;

7with good will doing service, as unto the Lord, and not unto men:

8knowing that whatsoever good thing each one doeth, the same shall he receive again from the Lord, whether he be bond or free.