THE ORAL LAW TEACHES YOU MUST WASH YOUR HANDS BEFORE YOU EAT

Luke 11:37 And as he spake, a certain Pharisee besought him to dine with him: and he went in, and sat down to meat.

Luke 11:38 And when the Pharisee saw it, he marvelled that he had not first washed before dinner.

Luke 11:39 And the Lord said unto him, Now do ye Pharisees make clean the outside of the cup and the platter; but your inward part is full of ravening and wickedness.