'Messenger' in the Bible

Then Jezebel sent a messenger to Elijah, saying, "So let the gods do to me, and more also, if I don't make your life as the life of one of them by tomorrow about this time!"

The messenger who went to call Micaiah spoke to him, saying, "See now, the prophets declare good to the king with one mouth. Please let your word be like the word of one of them, and speak good."