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

Every high priest is a man chosen to represent other people in their dealings with God. He presents their gifts to God and offers sacrifices for their sins.

That is why he must offer sacrifices for his own sins as well as theirs.

And in another passage God said to him, “You are a priest forever in the order of Melchizedek.”

And God designated him to be a High Priest in the order of Melchizedek.

You have been believers so long now that you ought to be teaching others. Instead, you need someone to teach you again the basic things about God’s word. You are like babies who need milk and cannot eat solid food.