1 Kings 21:20

Hast thou found me, O mine enemy Ahab had not thought of a penalty to overtake him, but the sight of Elijah makes him feel not penitent, but indignant that the avenger of wrong is so soon at hand. Therefore he calls Elijah his enemy.

because thou hast sold thyself Here the LXX. adds μάτην =in vain. This appears to be an attempt at interpretation, indicating that Ahab had thought to take the price for his bargain, and to escape all consequences, and that in this he was to be disappointed. The complete surrender of the king into the hands of others is well expressed by -thou hast sold thyself".

to work evil R.V. to do that which is evil. As in all other places where this expression occurs.

in the sight of the Lord Here the LXX. adds -to provoke him to anger".