Charles Ellicott Commentary 1 Kings 21:20

"And Ahab said to Elijah, Hast thou found me, O mine enemy? And he answered, I have found thee, because thou hast sold thyself to do that which is evil in the sight of Jehovah." — 1 Kings 21:20 (ASV)

Hast thou found me, O mine enemy?— The cry is partly of dismay, partly of excuse. Ahab, having no word of defence to utter, endeavours to attribute Elijah’s rebuke and condemnation to simple enmity, much as in 1 Kings 18:17 he cries out, Art thou he that troubleth Israel? The crushing answer is that the prophet did not come because he was an enemy, but because Ahab had sold himself—had become a slave instead of a king—under the lust of desire and the temptation of Jezebel.