"they shall wash their hands over the heifer of the broken neck in the river-bed": on the spot where its neck was broken. I might think that they may go up from the river-bed; it is, therefore, written "in the river-bed." (Ibid. 7) "And they shall answer and they shall say": Their washing and their saying must be in the river-bed.
(Devarim 21:7) "And they shall answer and say": in the holy tongue.