A good tree cannot bring forth evil fruit, neither can a corrupt tree bring forth good fruit.
Matthew 7:18
King James Version (public domain)
Traditionally attributed to Matthew · 1st century AD · One of the twelve apostles of Jesus; tax collector by trade
Context
16Ye shall know them by their fruits. Do men gather grapes of thorns, or figs of thistles?
17Even so every good tree bringeth forth good fruit; but a corrupt tree bringeth forth evil fruit.
18A good tree cannot bring forth evil fruit, neither can a corrupt tree bring forth good fruit.
19Every tree that bringeth not forth good fruit is hewn down, and cast into the fire.
20Wherefore by their fruits ye shall know them.