Contradiction with Mark 7:3-4
These verses describe how the Pharisees and all the Jews do not eat unless they wash their hands, holding to the tradition of the elders, which implies ritual washing was a later tradition not necessarily commanded by God as in Exodus 40:31.
Mark 7:3-4: For the Pharisees, and all the Jews, except they wash [their] hands oft, eat not, holding the tradition of the elders. [oft: or, diligently: in the original, with the fist: Theophylact, up to the elbow]
Contradiction with Matthew 15:2
This verse mentions the Pharisees asking Jesus why his disciples break the tradition of the elders, indicating that washing hands before eating was a human tradition contrasted with the commanded washing in Exodus 40:31.
Matthew 15:2: Why do thy disciples transgress the tradition of the elders? for they wash not their hands when they eat bread.
Contradiction with Hebrews 9:10
It states that various washings were imposed until the time of reformation, indicating that such ceremonial washings were temporary and not of eternal significance, contrasted with the specific command in Exodus 40:31.
Hebrews 9:10: [Which stood] only in meats and drinks, and divers washings, and carnal ordinances, imposed [on them] until the time of reformation. [ordinances: or, rites, or, ceremonies]