Hebrews 13:10

We have an altar, whereof they have no right to eat that serve the tabernacle. For the bodies of those beasts whose blood is brought into the holy place by the high priest as an offering for sin, are burned without the camp.

This is an astounding argument. Very well, he seems to say, "You people who want to eat according to the rules of the old order, hear this. Even the priests of that order could not partake of the bodies of the animals used in sin offerings, for they were burned without the camp. Very well, the true sin offering is Christ, who suffered without the camp, fulfilling the type; and they of the old order have no right whatsoever to partake of Christ, unless they shall repudiate the old order and identify themselves with him who suffered without the camp. Thus, the writer's argument is conclusive and overwhelming. Let his readers forget about keeping old rules and restrictions; to keep them is to make Christ unavailable to them. See under "Day of Atonement" (Hebrews 9:8).