Numbers 19:1 MSG

[1] God spoke to Moses and Aaron: “This is the rule from the Revelation that God commands: Tell the People of Israel to get a red cow, a healthy specimen, ritually clean, that has never been in harness. Present it to Eleazar the priest, then take it outside the camp and butcher it while he looks on. Eleazar will take some of the blood on his finger and splash it seven times in the direction of the Tent of Meeting.