Hebrews 9:7-9

7But only the high priest enters once a year into the inner tent, and not without blood that he offers for himself and for the sins of the people committed in ignorance.

8The Holy Spirit is making clear that the way into the holy place had not yet appeared as long as the old tabernacle was standing.

9This was a symbol for the time then present, when gifts and sacrifices were offered that could not perfect the conscience of the worshiper.