1 Kings 13:11

Now there dwelt an old prophet in Bethel; and his sons came and told him all the works that the man of God had done that day in Bethel: the words which he had spoken unto the king, them they told also to their father.

Now there dwelt an old prophet in Beth-el. If this was a true prophet, he was a bad man, and in effecting the malevolent design he had in view, an emissary of Satan, Gods true prophets were holy men (2 Peter 1:21). But it appears that the prophetic gift, or at least occasional communications of that gift, were imparted to some who did not possess that character - of which Balaam presents a notable example. This seems to have been the case with this old prophet. He deceived the prophet of Judah with a lie, uttered in the name of God, He may have been employed to announce communications from heaven; but his heart was not perfect toward God. He was unfaithful: he dwelt in a city of idolaters, and did not testify against their sin. He could not therefore be enlisted by Yahweh in the solemn service of reproving Israel.