Matthew 3:10
Already the axe is lying at the root of the trees. Therefore every tree that fails to bear good fruit will be cut down and thrown into the fire.
Matthew 7:15-20
Beware of false Teachers--men who come to you in the guise of sheep, but at heart they are ravenous wolves.
Matthew 21:19
And, noticing a solitary fig tree by the road-side, he went up to it, but found nothing on it but leaves. So he said to it: "Never again shall fruit be gathered off you." And suddenly the fruit tree withered up.
Luke 13:7-9
So he said to his gardener 'Three years now I have come to look for fruit on this fig tree, without finding any! Cut it down. Why should it rob the soil?'
John 15:2-8
Any unfruitful branch in me he takes away, and he cleanses every fruitful branch, that it may bear more fruit.