'Servant' in the Bible

for it is God's servant for your good. But if you do wrong, be in fear, for it does not bear the sword in vain. It is God's servant to administer retribution on the wrongdoer.

Who are you to pass judgment on another's servant? Before his own master he stands or falls. And he will stand, for the Lord is able to make him stand.

For I tell you that Christ has become a servant of the circumcised on behalf of God's truth to confirm the promises made to the fathers,

Now I commend to you our sister Phoebe, who is a servant of the church in Cenchrea,