Matthew 7:16-20

¹⁶ By their fruit you will recognize them. Do people pick grapes from thornbushes, or figs from thistles? ¹⁷ Likewise, every good tree bears good fruit, but a bad tree bears bad fruit. ¹⁸ A good tree cannot bear bad fruit, and a bad tree cannot bear good fruit. ¹⁹ Every tree that does not bear good fruit is cut down and thrown into the fire. ²⁰ Thus, by their fruit you will recognize them.

Just in case you were wondering