Contradiction with Mark 7:14
Matthew 15:1 depicts a focus on tradition, but Mark 7:14 emphasizes the irrelevance of external rituals compared to internal purity, contradicting the initial premise.
Mark 7:14: There is nothing from without a man, that entering into him can defile him: but the things which come out of him, those are they that defile the man.
Contradiction with Colossians 2:8
This verse warns against being taken captive by human traditions, challenging the tradition-focused dispute depicted in Matthew 15:1.
Colossians 2:8: Beware lest any man spoil you through philosophy and vain deceit, after the tradition of men, after the rudiments of the world, and not after Christ. [rudiments: or, elements] [make a prey: or, seduce you, or, lead you astray]
Contradiction with Isaiah 29:13
The verse critiques those who honor God with lip service yet follow human commandments, possibly in contrast with the Pharisees' adherence to tradition shown in Matthew 15:1.
Isaiah 29:13: Wherefore the Lord said, Forasmuch as this people draw near [me] with their mouth, and with their lips do honour me, but have removed their heart far from me, and their fear toward me is taught by the precept of men: