John Gill Commentary 1 Kings 22:23

"Now therefore, behold, Jehovah hath put a lying spirit in the mouth of all these thy prophets; and Jehovah hath spoken evil concerning thee." — 1 Kings 22:23 (ASV)

Now therefore behold, the Lord has put a lying spirit in the
mouths of all these your prophets
That is, suffered the lying spirit to suggest a lie to them, and sent them strong delusions to believe that lie, whose minds were disposed at any rate to flatter Ahab, to whom they told it; which was the way designed to bring him to the ruin appointed for him:

and the Lord has spoken evil concerning you :
he had decreed it in himself, declared it by Micaiah his prophet, and suffered all those steps to be taken by Satan and the false prophets, to bring him to it.