Mark 7:12

“And ye suffer him no more to do ought for his father, or his mother.] According to the Jewish canons f166, if a man vowed a thing which is contrary to a command, he was obliged to keep his vow, and break the command: thus, if a man vowed that his father or his mother should never receive any benefit from what he had, but that his substance was as “Corban”, or as any thing devoted to divine service, he was obliged to keep his vow; nor was he allowed after this to do any thing for his father, or mother, however poor or helpless they might be; unless he applied to a wise man to revoke his vow, or to give him liberty to do it; for he could not do it of himself, as wicked as it was; and though he…”

“See this passage explained in the notes at Matthew 15:1-20. Mark 7:1 Came from Jerusalem - Probably to observe his conduct, and to find matter of accusation against him. Mark 7:2 Defiled hands - The hands were considered defiled or polluted unless they were washed previous to every meal. Mark 7:3 Except they wash their hands oft - Our word “oft” means frequently, often. The Greek wore translated oft has been rendered various ways. Some have said that it means “up to the wrist” - unless they wash their hands up to the wrist. Others have said up to the elbow.” There is evidence that the Pharisees had some such foolish rule as this about washing, and it is likely that they practiced it…”