'Face to face' in the Bible

And while Obadiah was on his way, he came face to face with Elijah; and seeing who it was, he went down on his face and said, Is it you, my lord Elijah?

And Ahab said to Elijah, Have you come face to face with me, O my hater? And he said, I have come to you because you have given yourself up to do evil in the eyes of the Lord.