Hebrews 9 (selected verses)

Now even the first covenant had regulations for worship and an earthly sanctuary. For a tent was constructed, the first one, in which were the lampstand, the table, and the bread of the Presence; this is called the Holy Place. Behind the second curtain was a tent called the Holy of Holies.  In it stood the golden altar of incense and the ark of the covenant overlaid on all sides with gold, in which there were a golden urn holding the manna, and Aaron’s rod that budded, and the tablets of the covenant; above it were the cherubim of glory overshadowing the mercy seat. Of these things we cannot speak now in detail.

Such preparations having been made, the priests go continually into the first tent to carry out their ritual duties; but only the high priest goes into the second, and he but once a year, and not without taking the blood that he offers for himself and for the sins committed unintentionally by the people.

But when Christ came as a high priest of the good things that have come, then through the greater and perfect tent (not made with hands, that is, not of this creation),  he entered once for all into the Holy Place, not with the blood of goats and calves, but with his own blood, thus obtaining eternal redemption. For if the blood of goats and bulls, with the sprinkling of the ashes of a heifer, sanctifies those who have been defiled so that their flesh is purified, how much more will the blood of Christ, who through the eternal Spirit offered himself without blemish to God, purify our conscience from dead works to worship the living God!

For this reason he is the mediator of a new covenant, so that those who are called may receive the promised eternal inheritance. For Christ did not enter a sanctuary made by human hands, a mere copy of the true one, but he entered into heaven itself, now to appear in the presence of God on our behalf.