Hebrews 5:1, 3, 6, 10, 12

For every high priest taken from among men is appointed for men in things pertaining to God, that he may offer both gifts and sacrifices for sins.

Because of this he is required as for the people, so also for himself, to offer sacrifices for sins.

As He also says in another place: “You are a priest forever According to the order of Melchizedek”

called by God as High Priest “according to the order of Melchizedek,”

For though by this time you ought to be teachers, you need someone to teach you again the first principles of the oracles of God; and you have come to need milk and not solid food.