Hebrews 9:6-8

Now when these things have been so prepared, the priests are continually entering the outer tabernacle performing the divine worship, but into the second, only the high priest enters once a year, not without taking blood, which he offers for himself and for the sins of the people committed in ignorance. The Holy Spirit is signifying this, that the way into the holy place has not yet been disclosed while the outer tabernacle is still standing