Hebrews 9:3

9:3 And after the second curtain there was a tent called the holy of holies.

Hebrews 9:7

9:7 But 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.

Hebrews 9:12

9:12 and he entered once for all into the most holy place not by the blood of goats and calves but by his own blood, and so he himself secured eternal redemption.