民數記 19:9

必有一個潔淨的人收起母牛的灰，存在營外潔淨的地方，為以色列會眾調做除污穢的水。這本是除罪的。

And a man that is clean shall gather up the ashes of the heifer, and lay them up without the camp in a clean place, and it shall be kept for the congregation of the children of Israel for a water of separation: it is a purification for sin.