'Order of Melchizedek' in the Bible

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

being called by God a high priest after the order of Melchizedek;

where the Forerunner has entered for us, even Jesus, having become a high priest forever after the order of Melchizedek.

Therefore if perfection were by the Levitical priesthood (for under it the people received the Law), what further need was there that another priest should rise after the order of Melchizedek, and not be called after the order of Aaron?

For He testifies, "You are a priest forever after the order of Melchizedek."

(for those priests were made without an oath, but this one was made with an oath by Him who said to Him, "The Lord swore and will not repent, You are a priest forever after the order of Melchizedek,")