Contradiction with Matthew 5:19
This verse encourages following the commandments and teaching them, which contrasts with Paul's past zeal in Galatians 1:14 for traditions without faith in Christ.
Matthew 5:19: Whosoever therefore shall break one of these least commandments, and shall teach men so, he shall be called the least in the kingdom of heaven: but whosoever shall do and teach [them], the same shall be called great in the kingdom of heaven.
Contradiction with Matthew 15:3
Jesus questions the Pharisees for transgressing God's commandment due to their traditions, opposing the adherence to traditions mentioned in Galatians 1:14.
Matthew 15:3: But he answered and said unto them, Why do ye also transgress the commandment of God by your tradition?
Contradiction with Colossians 2:8
Warns against being deceived by human traditions, opposing Paul's former zeal for traditions as noted in Galatians 1:14.
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 Mark 7:8
Rebukes neglecting God's commandments for the sake of tradition, contrasting with Galatians 1:14 where Paul is zealous for traditions.
Mark 7:8: For laying aside the commandment of God, ye hold the tradition of men, [as] the washing of pots and cups: and many other such like things ye do.
Contradiction with Titus 1:14
Advises avoiding Jewish fables and commandments of men, in contradiction to the pursuit of Jewish traditions in Galatians 1:14.
Titus 1:14: Not giving heed to Jewish fables, and commandments of men, that turn from the truth.