'Bond servants' in the Bible

Bondservants, obey in all things your masters according to the flesh, not with eyeservice, as menpleasers, but in singleness of heart, fearing the Lord.

For you know that it is from the Lord you will receive the inheritance as your reward. Christ is the Master whose bondservants you are.

Masters, deal out to your bondservants justice and equity, knowing that ye also have a master in heaven.