Hebrews 9:10, 13-14, 23

For that old system deals only with food and drink and various cleansing ceremonies—physical regulations that were in effect only until a better system could be established.

Under the old system, the blood of goats and bulls and the ashes of a heifer could cleanse people’s bodies from ceremonial impurity. Just think how much more the blood of Christ will purify our consciences from sinful deeds so that we can worship the living God. For by the power of the eternal Spirit, Christ offered himself to God as a perfect sacrifice for our sins.

That is why the Tabernacle and everything in it, which were copies of things in heaven, had to be purified by the blood of animals. But the real things in heaven had to be purified with far better sacrifices than the blood of animals.