Deuteronomy 21:4

And the elders of that city shall bring the heifer down to a valley with running water , which is neither plowed nor sown , and shall break the heifer’s neck there in the valley .

and lead it down to a valley that has not been plowed or planted and where there is a flowing stream. There in the valley they are to break the heifer`s neck.

And the elders of that city shall bring down the heifer unto a rough valley, which is neither eared nor sown, and shall strike off the heifer's neck there in the valley :