'Ambassadors' in the Bible

When the ambassadors of Babylon’s rulers were sent to him to inquire about the miraculous sign that happened in the land, God left him to test him and discover what was in his heart.

Ambassadors will come from Egypt;Cush will stretch out its hands to God.

However, this king revolted against him by sending his ambassadors to Egypt so they might give him horses and a large army. Will he flourish? Will the one who does such things escape? Can he break a covenant and still escape?