Matthew 7:18
A good tree cannot produce bad fruits, neither can a tree bad in kind produce good fruits.
1 John 3:9-10
Every one who is born of God, doth not practise sin, because his seed abideth in him: and he cannot sin, because he is born of God.
Galatians 5:17
For the flesh hath appetites contrary to the Spirit, and the Spirit contrary to the flesh, and these act in opposition the one to the other: so that ye do not the things which ye 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 flesh hath appetites contrary to the Spirit, and the Spirit contrary to the flesh, and these act in opposition the one to the other: so that ye do not the things which ye would.
1 John 3:9
Every one who is born of God, doth not practise sin, because his seed abideth in him: and he cannot sin, because he is born of God.
General references
Luke 6:43
For there is no good tree which produceth fruit of a bad quality; neither doth a tree of a bad sort produce good fruit.