'Tradition of the Elders' in the Bible

Wherefore do thy disciples transgress the tradition of the elders? for they wash not their hands, when they eat bread!

For, the Pharisees, and all the Jews, unless with care they wash their hands, eat not, holding fast the tradition of the elders;

and so the Pharisees and the Scribes, question, him - For what cause do thy disciples not walk according to the tradition of the elders, but, with defiled hands, eat bread?