1 Kings 20:13 - Matthew Poole's English Annotations on the Holy Bible

There came a prophet; who having hid himself before, now ventures to come to Ahab, having this welcome message in his mouth. Thus saith the Lord: God, though forsaken and neglected by Ahab, prevents him with his gracious promise of help; partly that Ahab and the idolatrous Israelites might hereby be fully convinced, and won to God, or left without all excuse; and partly, that Ben-hadad's intolerable pride, and contempt of God, and of his people, might be repressed and punished; and partly, that the remnant of his prophets and people who were involved in the same calamity with the rest of the Israelites might be preserved and delivered. Thou shalt know that I am the Lord, and not Baal, because I will deliver thee, which he cannot do.