Numbers 19:2-6

2“This is the statute of the law that the LORD has commanded: Instruct the Israelites to bring you an unblemished red heifer that has no defect and has never been placed under a yoke. 3Give it to Eleazar the priest, and he will have it brought outside the camp and slaughtered in his presence.

4Eleazar the priest is to take some of its blood on his finger and sprinkle it seven times toward the front of the Tent of Meeting. 5Then the heifer must be burned in his sight. Its hide, its flesh, and its blood are to be burned, along with its dung. 6The priest is to take cedar wood, hyssop, and scarlet wool and throw them onto the burning heifer.