Matthew 7:16-20King James Version (KJV)
16 Ye shall know them by their fruits. Do men gather grapes of thorns, or figs of thistles?
17 Even so every good tree bringeth forth good fruit; but a corrupt tree bringeth forth evil fruit.
18 A good tree cannot bring forth evil fruit, neither can a corrupt tree bring forth good fruit.
19 Every tree that bringeth not forth good fruit is hewn down, and cast into the fire.
20 Wherefore by their fruits ye shall know them.
Matthew 7:16-20Amplified Bible (AMP)
16 By their fruit you will recognize them [that is, by their contrived doctrine and self-focus]. Do people pick grapes from thorn bushes or figs from thistles? 17 Even so, every healthy tree bears good fruit, but the unhealthy tree bears bad fruit. 18 A good tree cannot bear bad fruit, nor can a bad tree bear good fruit. 19 Every tree that does not bear good fruit is cut down and thrown into the fire. 20 Therefore, by their fruit you will recognize them [as false prophets].