Numbers 19:3-4

3And you shall give it to Eleazar the priest, and ait shall be taken outside the camp and slaughtered before him. 4And Eleazar the priest shall take some of its blood with his finger, and bsprinkle some of its blood toward the front of the tent of meeting seven times.

Hebrews 13:11

11For cthe bodies of those animals whose blood is brought into the holy places by the high priest as a sacrifice for sin are burned doutside the camp.
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