Matthew 7:15-20,
Jesus said; “Beware of false prophets who come to you in sheep’s clothing but inwardly are savage wolves. You will know them by their fruit. Grapes aren’t gathered from thorns, or figs from thistles, are they? In the same way, every good tree produces good fruit, but a rotten tree produces bad fruit. A good tree cannot produce bad fruit, and a rotten tree cannot produce good fruit. Every tree that doesn’t produce good fruit will be cut down and thrown into a fire. So by their fruit, you will know them”.