And the masters! the same things do ye unto them, letting threatening alone, having known that also your Master is in the heavens, and acceptance of persons is not with him.
Ephesians 6:9
Also Ephesians 6:5 in the NIV needs a bit of explaining because the word used meaning "slave" is the same one in Hebrew as meaning "servant". The Biblical "slavery" was always regarding bonded indenture or voluntary servitude for a fixed term; besides, Ephesians is a letter to the people of Ephesus (whivh I believe is in Greece) where slavery was practiced; it was a society that was non-Christian and had slavery and Paul writes a letter to these people to tell them to be good to each other, follow the example of Christ etc. So:
The servants! obey the masters according to the flesh with fear and trembling, in the simplicity of your heart, as to the Christ; not with eye-service as men-pleasers, but as servants of the Christ, doing the will of God out of soul, with good-will serving, as to the Lord, and not to men, having known that whatever good thing each one may do, this he shall receive from the Lord, whether servant or freeman. And the masters! the same things do ye unto them, letting threatening alone, having known that also your Master is in the heavens, and acceptance of persons is not with him.
Ephesians 6:5-9 YLT1898
