Num Numbers, chapter Book of Numbers, chapter 19
Then a man who is ceremonially clean is to gather up the ashes of the heifer and store them in a ceremonially clean place outside the camp. They must be kept by the congregation of Israel for preparing the water of purification; this is for purification from sin. 1Jn 1:7; Heb 9:13; Num 31:19; Num 31:23; Heb 10:22