Colossians 3:22-4:1 (New International Version)

 ²²Slaves, obey your earthly masters in everything; and do it, not only when their eye is on you and to win their favor, but with sincerity of heart and reverence for the Lord. ²³Whatever you do, work at it with all your heart, as working for the Lord, not for men, ²⁴since you know that you will receive an inheritance from the Lord as a reward. It is the Lord Christ you are serving. ²⁵Anyone who does wrong will be repaid for his wrong, and there is no favoritism.

Colossians 4

 ¹Masters, provide your slaves with what is right and fair, because you know that you also have a Master in heaven.