Melchizedek ("Righteous King"), was the King of Salem (Jerusalem), called priest of "God the Most High" (Genesis 14:18). After Abraham's victory over Chedorlaomer, Melchizedek greeted him with a gift of bread and wine. He then blesses Abraham, and Abraham gives him one-tenth of the goods taken from the battle with Chedorlaomer.
In Psalm 110:4, the promise is made, "You are a Priest forever according to the order of Melchizedek". In Hebrews 5:5-6, in speaking of Christ, God said to Him, "My Son, today I have honored You." And another time God said to Him, "You have been chosen to be a Priest forever, with the same rank as Melchizedek".
In Hebrews 7:3 it, states "Melchizedek had no father or mother, and there is no record of his ancestors. He was never born and never died but his life is like that of the Son of God - a Priest forever". In Hebrews 7:20-21, "God took an oath that Christ would always be a Priest, although He never said that to the other priests. Only to Christ He said, "The lord has sworn and will never change His mind: You are a Priest forever, with the rank of Melchizedek".
Next person in the Bible: Menahem, King of Israel