Matthew 3:10
and 12].
Matthew 7:15-20
"Look out for deceiving prophets, who approach you wearing sheep's clothing, but who are [actually] starving wolves in their hearts.
Matthew 21:19
Upon seeing a fig tree along side of the road, He approached it [i.e., expecting to find fruit on it], but found nothing but leaves. He said to the tree, "There will not be fruit on you ever again." Immediately the fig tree withered up.
Luke 13:7-9
So, he said to the orchard worker, "Look, I have been coming [here] looking for figs for three years now, but have not found any. Cut down the tree, [for] why should it waste the space [i.e., by not producing]?"
John 15:2-8
He will cut off [See verse 6] every branch [i.e., follower of Christ] who is in [fellowship with] me that does not bear fruit. And He will prune every branch that does bear fruit, so it will bear more fruit.