Deuteronomy 12:32 commands not to add to God's words — the very principle violated by the Pharisees' traditions Jesus condemns.

Titus 1:14 warns against 'commandments of people' who reject the truth—a direct echo of 'commandments of men' in Matthew 15:9.

1 Timothy 4:7 rejects 'profane myths and old wives' tales'—the same human traditions Jesus says lead to vain worship in Matthew 15:9.

1 Timothy 4:1-3 gives a specific example of human commands (forbidding marriage/foods) that parallel the vain worship Jesus condemns in Matthew 15:9.

Colossians 2:18-22 warns against human traditions and self-made religion — closely parallels Jesus' critique of commandments of men.

Mark 7:7 records the identical saying of Jesus, confirming the condemnation of human traditions as vain worship.

In Isaiah 58:1-3, the people's fasting is self-serving and ignored by God — parallel to vain worship with human doctrines.

Isaiah 29:13 is the OT prophecy Jesus directly quotes — teaching of men replaces heart-felt worship.

In Isaiah 1:13-15, God condemns vain offerings and feasts — a direct parallel to vain worship and human traditions here.

In Ecclesiastes 5:2-7, rash vows and many words in worship are vanity — directly parallel to vain worship with human doctrines.

Proverbs 30:6 warns against adding to God's words — a direct parallel to Jesus' rebuke of human traditions as additions.

John 4:24 declares worship must be in spirit and truth — opposite of the vain, rule-based worship condemned here.

1 Kings 12:32 shows Jeroboam instituting his own feast and priests—a clear OT example of worship based on human commands, condemned in Matthew 15:9.

James 1:26 says religion without bridling the tongue is useless — directly parallels the vain worship from human rules here.

2 Kings 16:10 shows Ahaz copying a pagan altar—a human innovation in worship that reflects the 'commandments of men' Jesus condemns.

In Exodus 20:7, the command against taking God's name in vain provides the basis for condemning empty worship here.

Hebrews 13:9 warns against 'strange teachings' about foods—an example of human commands that lead to vain worship as in Matthew 15:9.

Isaiah 55:2 calls people to stop laboring for what doesn't satisfy — paralleling the empty worship of human rules here.

Revelation 22:18 forbids adding to God's words—similar to how human commands are added as doctrine in Matthew 15:9.

Proverbs 30:5 declares God's word pure — contrasting with the impure human commandments Jesus rejects.

1 Timothy 1:4 warns against myths and genealogies — human speculations that distract from godly edification, similar to vain traditions.