Numbers 19:1-4

Now the Lord spoke to Moses and Aaron, saying, “This is the ordinance of the law which the Lord has commanded, saying: ‘Speak to the children of Israel, that they bring you a red heifer without blemish, in which there is no defect and on which a yoke has never come. You shall give it to Eleazar the priest, that he may take it outside the camp, and it shall be slaughtered before him; and Eleazar the priest shall take some of its blood with his finger, and sprinkle some of its blood seven times directly in front of the tabernacle of meeting.