Hebrews 9:6-8

Now when these things have been prepared in this way, the priests continually enter the outer [or first section of the] tabernacle [that is, the Holy Place] performing [their ritual acts of] the divine worship, but into the second [inner tabernacle, the Holy of Holies], only the high priest enters [and then only] once a year, and never without [bringing a sacrifice of] blood, which he offers [as a substitutionary atonement] for himself and for the sins of the people committed in ignorance. [Lev 16:15] By this the Holy Spirit signifies that the way into the Holy Place [the true Holy of Holies and the presence of God] has not yet been disclosed as long as the first or outer tabernacle is still standing [that is, as long as the Levitical system of worship remains a recognized institution]