The Pharisees and all of the other Jews strictly observe the traditions that their ancestors taught. For example, they refuse to eat until they first wash their hands with a special ritual, especially after they return from buying things in the marketplace. They think that God will be angry with them if they do not do that, because some person or thing unacceptable to God might have touched ◄them/the things they bought►. There are many other such traditions that they accept and try to obey. Specifically, they wash in a special way their cups, pots, kettles, containers, and beds in order that using these things will not make God reject them.