2
They saw some of his disciples eating food with "unclean" hands. That means they were not washed.
3
The Pharisees and all the Jews do not eat unless they wash their hands to make them pure. That's what the elders teach.
4
When they come from the market place, they do not eat unless they wash. And they follow many other teachings. For example, they wash cups, pitchers, and kettles in a special way.