Bible Verses About The High Priest: Needing to make atonement for his own sins

This is the kind of cohen gadol that meets our need — holy, without evil, without stain, set apart from sinners and raised higher than the heavens;

one who does not have the daily necessity, like the other cohanim g’dolim, of offering up sacrifices first for their own sins and only then for those of the people; because he offered one sacrifice, once and for all, by offering up himself.

For the Torah appoints as cohanim g’dolim men who have weakness; but the text which speaks about the swearing of the oath, a text written later than the Torah, appoints a Son who has been brought to the goal forever.