'Order of Melchizedek' in the Bible

As he says also in another place, "You are a priest forever, after the order of Melchizedek."

named by God a high priest after the order of Melchizedek.

where as a forerunner Jesus entered for us, having become a high priest forever after the order of Melchizedek.

Now if there was perfection through the Levitical priesthood (for under it the people have received the law), what further need was there for another priest to arise after the order of Melchizedek, and not be called after the order of Aaron?

for it is testified, "You are a priest forever, according to the order of Melchizedek."