Holiest of all
Hebrews 9:3
9:3 Holiest of all. Also called “the most holy place” (Exodus 26:34). In extra-Biblical writings, it has been called “the Holy of holies.” This chamber could only be entered once a year on the great Day of Atonement, and then only by the high priest, to present sacrificial blood for all the people (Hebrews 9:25; see Leviticus 16).