'Bond servant' in the Bible

just as you learned it from Epaphras, our beloved fellow bond-servant, who is a faithful servant of Christ on our behalf,

where there can't be Greek and Jew, circumcision and uncircumcision, barbarian, Scythian, bondservant, freeman; but Christ is all, and in all.

As to all my affairs, Tychicus, our beloved brother and faithful servant and fellow bond-servant in the Lord, will bring you information.

Epaphras, who is one of yourselves, a bondservant of Jesus Christ, sends greetings to you, always wrestling on your behalf in his prayers, that you may stand firm--Christians of ripe character and of clear conviction as to everything which is God's will.