Matthew 27:24-25

24So when Pilate saw that he was getting nowhere, but rather that a riot was breaking out, he took water and washed his hands [to ceremonially cleanse himself of guilt] in the presence of the crowd, saying, “I am innocent of this [righteous] Man’s blood; see to that yourselves.”

25And all the people answered, “Let [the responsibility for] His blood be on us and on our children!”