Matthew 7:15-19

“Constantly be on your guard against phony prophets. They come disguised as lambs, appearing to be genuine, but on the inside they are like wild, ravenous wolves! You can spot them by their actions, for the fruits of their character will be obvious. You won’t find sweet grapes hanging on a thorn bush, and you’ll never pick good fruit from a tumbleweed. So if the tree is good, it will produce good fruit; but if the tree is bad, it will bear only rotten fruit and deserves to be cut down and burned.