Hebrews 5:1-5

For every high priest taken from among men is appointed on behalf of people in things pertaining to God, in order to offer both gifts and sacrifices for sins;

he can deal gently with the ignorant and misguided, since he himself also is clothed in weakness;

and because of it he is obligated to offer sacrifices for sins for himself, as well as for the people.

And no one takes the honor for himself, but receives it when he is called by God, just as Aaron also was.

So too Christ did not glorify Himself in becoming a high priest, but it was He who said to Him, “You are My Son, Today I have fathered You”;