Matthew 7:16-20
16
By their fruits you will know them. Do you gather grapes from thorns, or figs from thistles?
17
Even so, every good tree produces good fruit; but the corrupt tree produces evil fruit.
18
A good tree can't produce evil fruit, neither can a corrupt tree produce good fruit.
19
Every tree that doesn't grow good fruit is cut down, and thrown into the fire.
20
Therefore, by their fruits you will know them.