Matthew 7:16
By the fruit of their lives you will know them. Do people gather grapes from thorn bushes, or figs from thistles?
Matthew 12:33
You must assume either that both tree and fruit are good, or that both tree and fruit are worthless; since it is by it's fruits that a tree is known.
James 3:12
Can a fig tree, my Brothers, bear olives? or a vine bear figs? No, nor can a brackish well give good water.
Matthew 7:20
Hence it is by the fruit of their lives that you will know such men.
Luke 6:43-45
There is no such thing as a good tree bearing worthless fruit, or, on the other hand, a worthless tree bearing good fruit.
2 Peter 2:10-18
especially those who, following the promptings of their lower nature, indulge their polluting passions and despise all control. Audacious and self-willed, they feel no awe of the Mighty, maligning them,
Jude 1:10-19
But these men malign whatever they do not understand; while they use such things as they know by instinct (like the animals that have no reason) for their own corruption.