'Washing' in the Bible

“Why do Your disciples violate the tradition (religious laws) handed down by the [Jewish] elders? For Your disciples do not [ceremonially] wash their hands before they eat.”

So when Pilate saw that he was able to do nothing, but that trouble was working up, he took water and, washing his hands before the people, said, The blood of this upright man is not on my hands: you are responsible.