Deuteronomy 21:4

21:4 and the elders of that city shall bring down the heifer to a valley with running water, which is neither plowed nor sown, and shall break the heifer's neck there in the valley.
-World English Bible

Other Translation

21:4 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:
-King James Version