Matthew 7:18
A good tree can not produce diseased fruit; nor can an unsound tree produce goodly fruit.
1 John 3:9-10
Whoever has been begotten of God does not work sin; because his seed remains in him: and he can not sin, because he has been begotten of God.
Galatians 5:17
For the desire of the flesh is against the Spirit, and the desire of the Spirit is against flesh; and these are opposed, the one to the other, so that you can not do what you would.
Treasury of Scripture Knowledge
Summary
A good tree cannot bring forth evil fruit, neither can a corrupt tree bring forth good fruit.
Cannot
General references
Bible References
Cannot
Galatians 5:17
For the desire of the flesh is against the Spirit, and the desire of the Spirit is against flesh; and these are opposed, the one to the other, so that you can not do what you would.
1 John 3:9
Whoever has been begotten of God does not work sin; because his seed remains in him: and he can not sin, because he has been begotten of God.
General references
Luke 6:43
For a good tree does not produce unsound fruit; nor does an unsound tree produce good fruit.