'Washing' in the Bible

They noticed that some of his disciples were eating with unclean hands, that is, without washing them.

(For the Pharisees and all the Jews do not eat unless they perform a ritual washing, holding fast to the tradition of the elders.

And when they come from the market, except they wash, they eat not. And many other things there be, which they have received to hold, as the washing of cups, and pots, brasen vessels, and of tables.

For laying aside the commandment of God, ye hold the tradition of men, as the washing of pots and cups: and many other such like things ye do.