1 Kings 17:18

What have I to do with thee? Used by persons who wish him whom they address to depart from them. (Cf. 2 Samuel 16:10; Luke 5:8).

O thou man of God? She recognizes the sacred character of Elijah, and feels that she is in presence of one who has closer communion with the Divine power than she. -Man of God" becomes afterwards the distinguished appellation of Elijah and Elisha.

art thou come unto me to call[R.V. bring] my sin to remembrance? The change of R.V. brings out a little more the woman's thought. The man of God has been sojourning with her, and hence God's attention, in her idea, has been more directed to her than it would otherwise have been. Her sin in this way has been brought to His remembrance, and so He has taken the life of her son as a punishment.