"Beware of false prophets, who come to you in sheep's clothing, but inwardly they are ravenous wolves. You will know them by their fruits. Do men gather grapes from thornbushes or figs from thistles? Even so, every good tree bears good fruit, but a bad tree bears bad fruit. A good tree cannot bear bad fruit, nor can a bad tree bear good fruit. Every tree that does not bear good fruit is cut down and thrown into the fire. Therefore by their fruits you will know them.
Judah did evil in the eyes of the Lord. By the sins they committed they stirred up his jealous anger more than those who were before them had done. They also set up for themselves high places, sacred stones and Asherah poles on every high hill and under every spreading tree. There were even male shrine prostitutes in the land; the people engaged in all the detestable practices of the nations the Lord had driven out before the Israelites.
Matthew 7:15-20
How about:
1 Kings 14:22-24