Numbers 19:2-9

2This is the statute of the law which Jehovah hath commanded, saying, Speak unto the children of Israel, that they bring thee a red heifer without blemish, wherein is no defect, and upon which never came yoke;

3and ye shall give it to Eleazar the priest, and he shall bring it outside the camp, and one shall slaughter it before him.

4And Eleazar the priest shall take of its blood with his finger, and shall sprinkle of its blood directly before the tent of meeting seven times.

5And one shall burn the heifer before his eyes; its skin and its flesh, and its blood, with its dung, shall he burn.

6And the priest shall take cedar-wood, and hyssop, and scarlet, and cast them into the midst of the burning of the heifer.

7And the priest shall wash his garments, and he shall bathe his flesh in water, and afterwards he shall come into the camp; and the priest shall be unclean until the even;

8and he that hath burned it shall wash his garments in water, and bathe his flesh in water, and shall be unclean until the even.

9And a clean man shall gather the ashes of the heifer, and deposit them outside the camp in a clean place, and it shall be kept for the assembly of the children of Israel for a water of separation: it is a purification for sin.