Leviticus 16:2; Hebrews 6:19; Hebrews 9:3; Hebrews 9:7

and the Lord said to Moses, Tell Aaron your brother not to dcome at any time into the Holy Place inside the veil, before the mercy seat that is on the ark, so that he may not die. For eI will appear in the cloud over the mercy seat.

19 We have this as a sure and steadfast anchor of the soul, a hope that enters into nthe inner place behind the curtain,

Behind rthe second curtain was a second section1 called the Most Holy Place,

but into the second only athe high priest goes, and he but aonce a year, and not without taking blood, bwhich he offers for himself and for the unintentional sins of the people.