Matthew 15:11 states the same principle that defilement comes from within — Jesus expands on it here about the heart.

Matthew 12:34 teaches that the mouth speaks from the heart's abundance — directly reinforcing that defiling words originate in the heart.

Proverbs 6:12 describes a scoundrel with a corrupt mouth — same link between speech and inner wickedness that defiles a person.

James 3:6-10 expands on the tongue as a fire that defiles — directly building on Jesus' point that mouth-speech reveals a corrupt heart.

Titus 1:15 explains that defilement comes from an unbelieving mind and conscience, echoing Jesus' teaching that what defiles comes from the heart.

James 1:14 traces temptation to one's own lust, reinforcing the idea that evil desires arise from within the heart.

1 Samuel 24:13 cites the proverb 'out of the wicked comes wickedness' — an OT parallel to Jesus' teaching that evil deeds/speech reveal the heart.

Proverbs 15:28 links the mouth of the wicked to gushing evil — confirming the heart-mouth connection that defiles.

Proverbs 10:32 contrasts righteous lips with wicked mouths — reinforcing that speech reveals the heart's moral condition.

Proverbs 15:2 shows the fool's mouth gushing folly — parallel to Jesus' teaching that what comes out reveals the heart's defilement.

Luke 19:22 shows a master judging by the servant's own words — echoing that speech exposes inner character and brings accountability.