'Man of God' in the Bible

Then the woman came and told her husband, saying, A man of God came to me, and his countenance was like the countenance of the agent of God, very awesome. And I did not ask him from where he was, neither did he tell me his name,

Then Manoah entreated LORD, and said, Oh, LORD, I pray thee, let the man of God whom thou sent come again to us, and teach us what we shall do to the child that shall be born.