Matthew 7:15-20

15 "Beware of the false prophets! They come to you wearing sheep's clothing, but underneath they are hungry wolves!

16 You will recognize them by their fruit. Can people pick grapes from thorn bushes, or figs from thistles?

17 Likewise, every healthy tree produces good fruit, but a poor tree produces bad fruit.

18 A healthy tree cannot bear bad fruit, or a poor tree good fruit.

19 Any tree that does not produce good fruit is cut down and thrown in the fire!

20 So you will recognize them by their fruit.