Numbers 19:9

Then a clean man shall gather the ashes of the cow, and he shall pour them out beyond the camp, in a very pure place, so that they may be preserved for the multitude of the sons of Israel, and for the water of aspersion, because the cow was burned for sin

Other versions

King James Version

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.

English Standard Version

And a man who is clean shall gather up the ashes of the heifer and deposit them outside the camp in a clean place. And they shall be kept for the water for impurity for the congregation of the people of Israel; it is a sin offering.

New International Version

"A man who is clean shall gather up the ashes of the heifer and put them in a ceremonially clean place outside the camp. They shall be kept by the Israelite community for use in the water of cleansing; it is for purification from sin.