Deuteronomy 21:3
And it shall be, that the city which is next unto the slain man, even the elders of that city shall take an heifer, which hath not been wrought with, and which hath not drawn in the yoke;
Deuteronomy 21:6
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: