Matthew 12:33-34

“You must determine if a tree is good or rotten. You can recognize good trees by their delicious fruit. But if you find rotten fruit, you can be certain that the tree is rotten. The fruit defines the tree. But you who are known as the Pharisees are rotten to the core like venomous snakes. How can your words be good if you are rotten within? For what has been stored up in your hearts will be heard in the overflow of your words!