Deuteronomy 21:6 KJV
And all the elders of that city, that are next unto the slain man, shall wash their hands over the heifer that is beheaded in the valley:
Deuteronomy 21:6, King James Version
In context
5 And the priests the sons of Levi shall come near; for them the Lord thy God hath chosen to minister unto him, and to bless in the name of the Lord; and by their word shall every controversy and every stroke be tried:
6 And all the elders of that city, that are next unto the slain man, shall wash their hands over the heifer that is beheaded in the valley:
7 And they shall answer and say, Our hands have not shed this blood, neither have our eyes seen it.