Contradiction with Mark 2:27
Numbers 28:16 emphasizes a specific religious observance, whereas Mark 2:27 suggests flexibility in observance for the benefit of people.
Mark 2:27: And he said unto them, The sabbath was made for man, and not man for the sabbath:
Contradiction with Colossians 2:16-17
Numbers 28:16 prescribes festival observance, while Colossians 2:16-17 argues against being judged for not following such festivals.
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]
Contradiction with Isaiah 1:13-14
While Numbers 28:16 commands observing the Passover, Isaiah 1:13-14 presents God as rejecting mere religious observance without true faithfulness.
Isaiah 1:13-14: Bring no more vain oblations; incense is an abomination unto me; the new moons and sabbaths, the calling of assemblies, I cannot away with; [it is] iniquity, even the solemn meeting. [iniquity: or, grief]
Contradiction with Hebrews 10:1
Numbers 28:16 institutes ritual observance, whereas Hebrews 10:1 implies such observances were only a shadow of what was to come and not the ultimate requirement.
Hebrews 10:1: For the law having a shadow of good things to come, [and] not the very image of the things, can never with those sacrifices which they offered year by year continually make the comers thereunto perfect.