1 John 3:9 says those born of God cannot sin — directly applying the principle that a good tree cannot bear bad fruit.

1 John 3:10 distinguishes God's children from the devil's by their fruit (righteousness) — the tree is known by its fruit.

Galatians 5:17 describes the flesh/Spirit conflict — a good tree (Spirit) cannot produce fleshly fruit, echoing the impossibility in Matthew 7:18.

Proverbs 10:16 contrasts righteous labor (life) with wicked fruit (sin) — echoing the principle that good and bad trees produce distinct fruit.