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