Hebrews 9:7-9

7But into the second part the high priest went alone once a year, not without blood, which he offered for himself and for the people’s sins committed in ignorance;

8the Holy Spirit indicating this, that the way into the Holiest of All was not yet made manifest while the first tabernacle was still standing.

9It was symbolic for the present time in which both gifts and sacrifices are offered which cannot make him who performed the service perfect in regard to the conscience—