2. Only on the Day of Atonement can the high priest enter the Holy of Holies.
But only the high priest entered the inner room, and that only once a year, and never without blood, which he offered for himself and for the sins the people had committed in ignorance.(NIV, Hebrews 9:7)
In the days of the Old Testament, the high priest could only enter the Holy of Holies alone once a year on the Day of Atonement;
The high priest must first purify himself and enter the Holy of Holies with blood to offer and atone for the sins of himself and the people.