Ephesians 6:5-7   5. Servants, be obedient to them that are your masters according to the flesh, with fear and trembling, in singleness of your heart, as unto Christ; 6. Not with eyeservice, as menpleasers; but as the servants of Christ, doing the will of God from the heart; 7. With good will doing service, as to the Lord, and not to men:

Colossians 3:22-25   22. Servants, obey in all things your masters according to the flesh; not with eyeservice, as menpleasers; but in singleness of heart, fearing God: 23. And whatsoever ye do, do it heartily, as to the Lord, and not unto men; 24. Knowing that of the Lord ye shall receive the reward of the inheritance: for ye serve the Lord Christ. 25. But he that doeth wrong shall receive for the wrong which he hath done: and there is no respect of persons.

1 Timothy 6:1-3   1. LET as many servants as are under the yoke count their own masters worthy of all honour, that the name of God and his doctrine be not blasphemed. 2. And they that have believing masters, let them not despise them, because they are brethren; but rather do them service, because they are faithful and beloved, partakers of the benefit. These things teach and exhort. 3. If any man teach otherwise, and consent not to wholesome words, even the words of our Lord Jesus Christ, and to the doctrine which is according to godliness;

1 Corinthians 7:20-24   20. Let every man abide in the same calling wherein he was called. 21. Art thou called being a servant? care not for it: but if thou mayest be made free, use it rather. 22. For he that is called in the Lord, being a servant, is the Lord's freeman: likewise also he that is called, being free, is Christ's servant. 23. Ye are bought with a price; be not ye the servants of men. 24. Brethren, let every man, wherein he is called, therein abide with God.