Contradiction with Matthew 5:17
Jesus states He came to fulfill the law, which includes Sabbath laws like in Exodus 35:15, indicating a change in how laws are applied.
Matthew 5:17: Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfil.
Contradiction with Colossians 2:16-17
Paul suggests that regulations about sabbaths are a shadow of things to come, meaning observance like in Exodus 35:15 may no longer be necessary.
Colossians 2:16-17: Let no man therefore judge you in meat, or in drink, or in respect of an holyday, or of the new moon, or of the sabbath [days]: [in meat...: or, for eating and drinking] [respect: or, part]