Matthew 27:4, 24

saying, “I have sinned by betraying innocent blood.” They replied, “What is that to us? See to that yourself!”

So 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.” [Deut 21:6-9; Ps 26:6]