'Ambassador' in the Bible

But if not, [while] [the other] is still far away, he sends an ambassador [and] asks {for terms of} peace.

For which I am an ambassador in bonds: that therein I may speak boldly, as I ought to speak.

yet for love’s sake I prefer to appeal to you—since I am such a person as Paul, an old man, and now also a prisoner [for the sake] of Christ Jesus—