Online Bible Commentary on Acts 12:9. And he went out, and followed; and he knew not that it was true which was done by the angel, but thought he saw a vision.

Jeremiah 23:15. Therefore thus saith the LORD of hosts concerning the prophets; Behold, I will feed them with wormwood, and make them drink the water of gall: for from the prophets of Jerusalem is profaneness gone forth into all the land.


http://qbible.com/comments/acts/12-9.html