Mark 7:2-4

2Now when they saw some of His disciples eat bread with defiled, that is, with unwashed hands, they found fault.

3For the Pharisees and all the Jews do not eat unless they wash their hands in a special way, holding the tradition of the elders.

4When they come from the marketplace, they do not eat unless they wash. And there are many other things which they have received and hold, like the washing of cups, pitchers, copper vessels, and couches.