Hebrews 7:27
Unlike the other high priests, He does not need to offer daily sacrifices, first for His own sins and then for the sins of the people; He sacrificed for sin once for all when He offered up Himself.

Hebrews 9:7
But only the high priest entered the inner room, and then only once a year, and never without blood, which he offered for himself and for the sins the people had committed in ignorance.

Leviticus 16:33
and make atonement for the Most Holy Place, the Tent of Meeting, and the altar, and for the priests and all the people of the assembly.