Hebrews 9:7-8

7But only the special leader of the priests could go into the second room. He went in there only once every year. He had to take with him blood from an animal that they had killed. He offered the blood to God on his own behalf, so that God would forgive his sins. He also offered it on behalf of the people. Then God would forgive their mistakes too.

8In this way, God's Holy Spirit was showing that the most holy place was not yet open to everyone. While the tent with its first room was still there, those were the rules for people to worship God.