Exodus 29:14

29:14 But the meat of the bull, its skin, and its dung you are to burn up outside the camp. It is the purification offering.

Leviticus 4:12

4:12 all the rest of the bull – he must bring outside the camp to a ceremonially clean place, to the fatty ash pile, and he must burn it on a wood fire; it must be burned on the fatty ash pile.

Leviticus 8:17

8:17 but the rest of the bull – its hide, its flesh, and its dung – he completely burned up outside the camp just as the Lord had commanded Moses.

Hebrews 13:11-12

13:11 For the bodies of those animals whose blood the high priest brings into the sanctuary as an offering for sin are burned outside the camp. 13:12 Therefore, to sanctify the people by his own blood, Jesus also suffered outside the camp.